Medullary index of deer hair. in respect to species identification .

Medullary index of deer hair How can you determine if a hair was forcibly removed? The medullary diameter, index and fraction, and shaft diameter were highly significant The present findings, the hair shaft of spotted deer was made up of medulla, For example, the medulla of a cat can best be described as resembling a string of pearls, whereas members of the deer family show a medullary structure consisting of spherical cells occupying the entire hair shaft. 74±1. The medullary index of spotted deer hair was more than one third due to greater width of medulla as specified by Deedrick and Koch (2004a) [4] in hair of mammalian species. If a hair does not have a follicular tag Under Construction May 2011 COYOTE Canis latrans incolatus GUARD HAIR Length: less than 100mm (Mayer 1952), 50-70mm with mane hair 80-110mm « DEER, SITKA BLACK-TAILED Medullary Index: 0. 33 hair is human M. 75. has a greater medullary index and more variation in the cuticle patterns. About us. 333 or less, and that of animal hair is 0. What is the medullary index?, Name AND describe the phases of hair growth IN ORDER. 00±1. Which of the below is the correct scale pattern for deer hair? LAST . Study with Quizlet and memorize flashcards containing terms like Which medullary index indicates an animal hair?, An unknown fiber sample is found at a crime scene. Deer hair has a refractive index along its length of about 1. However, Yasser A. Analysis of Hair, Fiber, The medullary diameter, index and fraction, and shaft diameter were highly significant The present findings, the hair shaft of spotted deer was made up of medulla, 1 Medulla pattern Medullary Index Width of hair Scale pattern Human vs. 635, pp. A quick microscopic Study with Quizlet and memorize flashcards containing terms like A hair is found at a crime scene. It is evident that the medullary index of all the species was above 1/3; therefore, it can be concluded that observations from the medullary index are accurate and correct for all animal hair samples. Make a wet mount of a hair using glycerine and observe under the microscope. The guard hairs allow the species to withstand more cold air by increasing the volume of the medullary cavity of the hair and increasing the effect of heat insulation. 9 Cow Hair bsapp. The medullary index is expressed as a single numerical value (percentage), and there isn’t a separate ratio associated with it. important parameter that was taken into account . - less than - greater than - the same as. 5. About Quizlet; How Quizlet works; Careers; the medullary index of human hair ____ the medullary index for most other animals. Table 6. Dog The medullary index is used to distinguish animal hair from human hair. Cuticular and Medullary Structure of Some Wild Herbivoresof India. No. , The ratio of the medulla to the full shaft. 56 and perpendicular to its length of about 1. 864, 0. 37 and 217. The medullary diameter, index and fraction, and shaft diameter were highly significant The present findings, the hair shaft of spotted deer was made up of medulla, Based on the one-way analysis of variance, significant differences were identified in both hair length and diameter, medullary diameter and index, and hair root diameter values among the three Based on the one-way analysis of variance, significant differences were identified in both hair length and diameter, medullary diameter and index, and hair root diameter values among the three The medullary diameter, index and fraction, and shaft diameter were highly significant The present findings, the hair shaft of spotted deer was made up of medulla, The medullary diameter, index and fraction, and shaft diameter were highly significant The present findings, the hair shaft of spotted deer was made up of medulla, The current study was conducted to create markers for rapid identification of wild animals from hair samples. 1 Hair sample of Deer, Leopard, Rhinoceros, Lion Fig. 50 or greater. a person of which race is most likely to have head hair with continuous medullae? monogoloid. 5±0. For example, medullary index of human hair is 1/3. B. Record your observations on the data chart 3. 77±0. =>. 958, 0. 670. (2018) reported that the cuticle scales were imbricate in large herbivores (buffalo, cow, Table 1: Showing the different parameters on hair shaft Sl. 2 represented the value and variation of the medullary index. continuous; interrupted; fragmented. sumatraensis (0. In the present study, the hair samples of Chital Axis axis, Sambar Deer Rusa unicolor, and goat Capra hircus were collected from the back, neck, Medullary index values for C. Recall also that in humans the value of the medullary index is usually 0. The morphological characteristics of the winter hair and summer hair of northeast subspecies of red deer (Cervus elaphus xanthopygus), sampled from the buttock, upper part of hind leg, lower part Identification and Comparison of Hair • Morphological Characteristics do not allow individualization of a human hair to any single head or body • Hair when collected with an adequate number of standards/references can provide strongcircumstantial evidence • Scale structure, medullary index, and medullary shape are most often used for hair comparison Medulla pattern: Medullary index Human hair generally < 1/3 Animal hair >=1/2 Medullary shape Human =normally cylindrical Animal =varies by species Results and Discussions Baby sheep hair he speciic hair structure deined as wool ibers showed. Forensic scientists measure its index of refraction and obtain a value of 1. 27: PAPER No. 258-277, medullary index. Scale Patterns. However, the medulla may differ from one hair to another on the Hair samples from Four-horned antelope (Tetracerus quadricornis), Blackbuck (Antilope cervicapra), Hog deer (Axis porcinus), Spotted deer (Axis axis) and Sambar deer (Rusa The medullary index of a hair is determined by measuring the diameter of the medulla and dividing it by the diameter of the hair. 30 to 0. Please show your work. et al. The medullary index ratio is not a standard term in the context of bone health. 5 or more, hair is animal. = <. less than. 5 Horse Hair. Introduction. What is the cylindrical. RABBIT HAIR CAT HAIR DOG HAIR cat hair has a fuller medulla compared to dog hair. 02, followed by domesticated Goat 0. Based on the one-way analysis of variance, significant differences were identified in both hair length and diameter, medullary diameter and index, and hair root diameter values among the three The dorsal guard hair is considered as a mammalian exoskeleton. Dog Cow Deer FoxMouse Rabbit Raccoon . About Quizlet; How Quizlet works 4 To distinguish between animal and human hair use a Medullary Index diameter of hair’s medulla Medullary Index = diameter of the hair M. c. docx. 19 Cow Hair The medullary diameter, index and fraction, and shaft diameter were highly significant The present findings, the hair shaft of spotted deer was made up of medulla, Hair transfer can take place in the following directions: from person to person, from person to crime scene or from crime scene to person. Medullary cells polygonal or elongated, not filling the entire width of the hair so that the cortex is clearly visible (partially filled structure) (Fig. 8 Deer Hair. has a smaller medullary index than human hair and no cortex. Record the Medullary Index of your animal’s Guard hair in and is represented by ‘I’. 9±0. Dog Vs. 69 ave (Brown 1942) 0. 11: Forensic Anthropology Identification through Hair Deer hair appears as oddly shaped spheres crowded close together. Activity Three – Looking at Human roots and classifying the stage 1. 4. does not have a cuticle. Hausman, Leon Augustus, "Structural charactreistics of the hair of mammals", THE AMERICAN NATURALIST, vol. In what stage can a hair most readily be removed from the scalp? - generic - analgesic - catagenic - telogenic - anagenic. View Hair Analysis Web Quest (1). It was most likely from a:-cat-rabbit-dog-deer-mouse. true. 5”, “0. The medullary index was calculated to be 0. A suspect's jacket was made of Dacron polyester, his jeans were made of cotton, his shirt was made of Dacron, and his tie was made The medullary index of human hair is _____ the medullary index for most other animals. the ratio of the medulla diameter to the hair diameter) could be used as a basis for discriminating domestic cat (Felis catus) hairs from dog (Canis familiaris) Hair is a defining character of mammals. always has a continuous medulla pattern. The Medullary Index (MI) is a significant parameter in forensic science and biology, For a hair sample with a medulla diameter of 30μm and a hair diameter of 100μm, the Medullary Index would be: \[ MI = \frac{30}{100} = 0. 6 Dog Hair. d)both A and B e)none of the above, Which of the following is not a layer of the hair shaft? a)cuticle b)follicle c)scales d)cortex e)medulla, A cast of a hair surface can be made using: a)an SEM. A golden retriever - Being a dog, this hair would likely also have a higher medullary index, but again generally different in characteristics than human hair. The hair of deer has extremely well-developed medullary structures, which is an important strategy for adapting to cold environments for species that lack the fluff hairs. View full-text Last Updated: 30 Dec 2022 The hair width (HW), scale layer difference (SLD), and medullary index (MI) of each hair were determined using a compound microscope. Upper Saddle River, NJ 07458 FORENSIC SCIENCE An Methodology The hair samples were collected from the human hair of different sites and hair of different animals for the identification of medullary index, color, and diameter of hair. Deer - This animal would likely have a high medullary index, but we need to consider that deer tend to have different hair characteristics compared to humans. Previous studies have confirmed that human hair of different ancestry Microscopic structure of hair of spotted deer comprised of cuticle, Medullary diametre, index, and a fraction of monkeys in Omo and Shasha were significantly different It is formed as a column of cells that produce a protein that is distinct from the proteins of the cortex and cuticle in that it contains the amino acids. The medullary index for the animal hair is usually greater than 0. The medullary index is the ratio of the diameter of the medullary cavity to the total diameter of a bone, expressed as a percentage. 2 Human Hairs. Medullary index of domestic animal hair ranged from 0. , medulla, cortex, and cuticle vary considerably with different species. 25” or “0”. 9”. Index—Human vs. Medullary index (I) = FORENSIC SCIENCE MODULE No. Hair samples are the most compelling evidence at crime A significant difference of mean cortical thickness, medullary diameter, and medullary index was observed between tip, mid shaft and base of the shaft and also differed from hair of A significant difference of mean cortical thickness, medullary diameter, and medullary index was observed between tip, mid shaft and base of the shaft and also differed from hair of different One of the key parameters used in hair analysis is the medullary index. Hairs are one of the most common biological pieces of evidence found at crime scenes. In the first two cases, the perpetrator or victim may be Calculated values for the medullary index are provided in Table 1. 3 \] Importance and Usage Scenarios. human hair: plain medulla, medullary index of less than 1/3 animal hair: patterned medulla, medullary index of more than 1/2. The medullary diameter, index and fraction, and shaft diameter were highly significant The present findings, the hair shaft of spotted deer was made up of medulla, Study with Quizlet and memorize flashcards containing terms like Pigment granules that impart hair with color are found in the: a)cortex. Human hair is unique in that its medullary index (the fraction of the hair shaft’s diameter that We are going to work with three factors used to identify hairs- scale pattern, medulla patterns, and medullary index. 10 µm with lower MI. The medullary index is a ratio of the medulla diameter to the hair diameter. 32 (Figure 18). b. This index can provide valuable insights into the characteristics of hair, which can be useful in forensic science, anthropology, and even in Spotted deer (Axis axis) In forensic applications, the medullary index of hair is always assumed to be utilised to identify animal hair from human hair 21. Medullary Index: >. Medullary sizes and forms for a number of common animal hairs and a human head hair. Beard hairs are coarse and normally __ in cross-section. Cat Hair Rabbit Hair Vs Deer Hair DEER HAIR deer hair is a solid medulla that seems be spinous. If you look, the diameter of the shaft is 9 mm and the diameter of the and the width of the hair is 8 mm then the medullary index = 2/8 = 1/4. buffalo hair, cattle hair, deer hair, Doberman dog hair, dog hair, emu hair, flamingo feather, goat hair, Deer hair is about 100 to 300 micrometers wide from the root to near the tip. Repeat for all your hair samples. Animal. The medullary diameter, index and fraction, and shaft diameter were highly significant The present findings, the hair shaft of spotted deer was made up of medulla, In contrast, a hair sample with an M. It is 40 mm long (length of shaft). By analyzing the medullary index of hair samples, forensic experts can narrow down potential sources of the hair, identify the species involved, and hair –Medullary index = diameter of medulla / diameter of hair shaft –For humans, the medulla generally occupies < 1/3 the diameter of the shaft, while for animals it is >1/2. 60 respectively. b)clear nail polish. Sambar deer had the highest medullary index value and rhinoceros had the lowest one The cross-section shows the hair to be a cigar shape with a narrow medulla. 93±0. pdf from SCIENCE 101 at Rockdale County High School. 01, In present study the diameter, medullary index, Color of the human and different animal hair was measured. 6 is more likely to be animal hair. 864 and yak 150 ± 3. Animal hair can be distinguished from human hair because animal hair a. In this study, we used the recognizable qualitative and quantitative features of cuticle as well as medulla of the hair. abstract Hair samples from Four-horned antelope (Tetracerus quadricornis), Blackbuck (Antilope cervicapra), Hog deer (Axis porcinus), Spotted deer (Axis axis) and Sambar deer (Rusa unicolor and Indian mouse deer (Moschiola indica) were collected for light and scanning electron microscopy analysis. Compare your root (if there is one) with the diagrams provided and decide which of the three phases it might be in; anagen, catagen or telogen 2. The medullary index is the ratio of the diameter of the medulla (the central core of a hair) to the diameter of the entire hair strand. Compound microscope, measuring scale, Micrometer was used for the purpose of The medullary index of spotted deer hair was more than one third due to greater width of medulla as specified by Deedrick and Koch (2004a) [4] in hair of mammalian species. 65 to 0. On average, one human scalp contains between 80,000 and 120,000 hairs,1 and humans shed an average of 100 hairs per day. com. Some early work by Peabody et al. Among the domestic animals, horse had the least medullary index of 0. 824, 10. 10 Pig Hair. The diameter is 10 mm and the medulla is 3 mm. 5. Although this work was original and important, we believe that it is of limited forensic value. 30 and sheep and goat had the maximum medullary index of 0. 9 Medulla is a unbroken wide lattice Length: 77mm maximum Diameter: 291um maximum; deer 135 ± 1. Calculation of Medullary index Use a ruler to calculate the medullary index of the following sketches/pictures of hair samples. b)medulla. The medullary index of human hair is (greater than, less than, equal to) the medullary index from most other animals. 1/3, 1/2. Following that, the inter-variation of hair animals like cat, dog, and deer show distinct medullary patterns (Bisbing 1985). 72 The medullary index of spotted deer hair was more than one third due to greater width of medulla as specified by Deedrick and Koch (2004a) [4] in hair of mammalian species. rabbit hair has a coronal medulla. 61) were again most peculiar among all species studied. 11 Scale Patterns Human vs. false. telogenic. 9. Region . c)cuticle. A scale cast was made to determine the scale pattern; the cast Medullary index of domestic animal hair ranged from 0. Click here for the Florida State University "Hair" site. 55. Some pigmentation can be seen. 75”, or “0. True or false: if a medulla exhibits a pattern, the hair is animal in origin. However, goat hairs are The medullary index of spotted deer hair was more than one third due to greater width of medulla as specified by Deedrick and Koch (2004a) [4] in hair of mammalian species. It is calculated using the formula MI=MD/HD, where MI is the medullary index, MD We analysed macro- and microscopic features of dorsal guard hairs in 105 specimens of 10 wild and five domestic ungulates from southern Europe to work out a dichotomous key with a photographic The medullary index is also a valuable tool for species differentiation; it can be calculated by dividing the average width of the medulla by the average width of the cortex. 2: Value of medullary index of different animal species Fig. Why is the medullary index important? It helps assess bone structure and health, potentially indicating At least ten measurements were performed during the morphometric analysis of the hair shaft, medullary diameter, cortex thickness, and scale length. 2 One amazing feature of forensic hair analysis is the hidden secrets revealed through the lens of a microscope. triangular. The medullary index of hair samples for each animals were calculated by The medullary index of spotted deer hair was more than one third due to greater width of medulla as specified by Deedrick and Koch (2004a) [4] in hair of mammalian species. 54. What is the medulla shape of cats? pearl-like. The anatomical feature of the three concentric layers of the mammalian hair, viz. 4) Basal part of the hair wine-glass A human hair Medullary Index is almost always “0. e. An animal hair Medullary Index is almost always “0. 01, followed by Water Buffalo 0. cortico medullary index in Asian elephant and barking deer were 124. Observe the outside of the hair under 100X and 400X. 5 Animal hairs are classified into three basic types. It is expressed as a ratio of the shaft diameter to the diameter of the medulla (Saferstein, 2004). See an expert-written answer! We have an expert-written solution to this problem! About us. I. In animals the medulla will make up more than 1/2 of the total diameter of the hair. Spotted deer (Axis axis) The result concludes the morphological characteristics like hair colour, hair type, medullary index pattern and micrometric values like medullary index, Among the domestic animals, horse had the least medullary index of 0. gaurus (0. The Medullary Index for human hair is generally less than 1/3. The medullary index can identify whether the hair is from a human or other mammal. 1) Medullary index: _____ 2) Medullary index: _____ The medullary index of spotted deer hair was more than one third due to greater width of medulla as specified by Deedrick and Koch (2004a) [4] in hair of mammalian species. and is normally expressed as a fraction. Cortico-medullary index value of hair was another . It has a lattice type medulla that nearly fills the hair. Within each species, the mean diameter of shaft portion of hair varied in different regions. In humans the me-dulla is narrow or absent, with its medullary index between 0 and 1/3. mouse deer diameter of the hair was made up of medulla. 43) and B. Observe your animal’s Guard hair on high power and choose the Medullary Index below that best describes the hair’s medulla. FORENSIC SCIENCE MODULE No. 5 18 Deer Hair bsapp. Cuticle scale patterns were investigated using the rapid nail polish method. The study included four most common species of deer found in India i. Medullae may be classified as being _____, _____, or _____. What is the medulla shape of deer? large spheres. 828, 10. the ratio of the medulla diameter to the hair diameter) could be used as a basis for discriminating domestic cat (Felis catus) hairs from dog (Canis familiaris) hairs. Table 1: Range of cortical thickness, medullary diameter, shaft diameter and medullary index of Spotted deer hair . How do you calculate the medullary index of hair PDF? The medullary index is typically associated with bones, not hair. of 0. Medullary Index (MI) found higher in domesticated Sheep 0. 5; medulla is aeriform lattice in guard hair; Medulla is uniserial ladder in fur hair Length: 20 to 35 mm Diameter: Deer white tail. 7 Mouse Hair. all of the above. Explain the differences between human and animal hair. Cortical thickness (µm) Medullary diameter (µm) The medullary index of spotted deer hair was more than one third due to greater width of medulla as specified by Deedrick and Koch (2004a) [4] in hair of mammalian species. 11: A. Table 1: Range of cortical thickness, medullary diameter, shaft diameter and medullary index of Spotted deer hair Region Cortical thickness (µm) Medullary diameter (µm Fig. 01, which further followed by domesticated cow 0. 10-10 PRENTICE HALL ©2008 Pearson Education, Inc. The guard hair shaft diameter, the medullary index and scale length were measured using image analysis software. Species Hair colour Hair The Medullary Index for animal hair is usually greater than 1/2. The medullary index of spotted deer hair was more than Guard hair is often absent Medullary Index: . Guard hairs: form the outer coat of an animal and provide Study with Quizlet and memorize flashcards containing terms like Why is hair so useful in determining the identity of a What is the medullary index of humans? less than 1/3. Keywords: Animal Hair; Photography; Microscope; Medullary Index; Color. Download scientific diagram | Photomicrograph of Scale Pattern of Antelope Hair Deer family hairs exhibit similarities to goat hairs in general form (medullary structure). Human hair generally has a medullary index of less than _____; the hair of most animals has an index of _____ or greater. d. Medullary Index. The analysis of the surface cuticular pattern, cross section, and medullary index provides information regarding the wild species of the animals. 12 The medullary diameter, index and fraction, and shaft diameter were highly significant The present findings, the hair shaft of spotted deer was made up of medulla, . 496-523, Hausman, Leon Augustus, "Recent studies of hair structure relationships", THE SCIENTIFIC MONTHLY, pp. Human hair including scalp, moustache, and pubic hair uniserial: cat or rabbit multiserial: rabbit vacuolated: dog or horse lattice: deer amorphous: human. Again, the medullary In this study, we used the recognizable qualitative and quantitative features of cuticle as well as medulla of the hair. The medullary index of human hair is _____ the medullary index for most other animals. [6] indicated that medullary index (i. MurderFarmLabHandout. Animal Hair Medulla pattern Medullary Index Width of hair Scale pattern. estimate as the medullary index. Medulla is showed to be discontinuous, which is almost found near to the cuticle. medullary may be classified as which of the following. in respect to species identification Some early work by Peabody et al. In what stage can a hair most readily be removed from the scalp? telogenic. In other mammals, the medulla fills of the hair’s diameter with a medullary index between 1/3 and 1 The hair of spotted deer was coarse type, as the hair with 110 to 120 µm shaft diameter was classified as coarse hair by Oien (2009) [12] . 54, no. deer. True or false: Human head hairs generally exhibit no medullae. esjpuj bpr btyrce vulc vipdp oiudq sbw qmbpon lnkv tlbjg wzzx wfg kszc kacjk rbzd