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Forensic Anthropology: Techniques for Body Identification by Sex, Age, and Ancestry

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Forensic anthropology focuses on identifying human remains through the analysis of skeletal features. Determining age involves examining cranial suture closure and the ossification of bones, with degeneration starting post-30. Sex determination analyzes skull features like the shape of the chin and the pelvis structure. Race identification is based on specific skull characteristics, notably the nasal aperture, palate shape, and zygomatic arches. Furthermore, forensic experts estimate height using length measurements of long bones, employing distinct formulas for males and females to improve accuracy.

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Forensic Anthropology: Techniques for Body Identification by Sex, Age, and Ancestry

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  1. FORENSIC ANTHROPOLOGY BODY IDENTIFICATION DETERMINING SEX, AGE , and RACE

  2. DETERMINING AGE • Changes occur as age increases (25-30) then degeneration begins • Cranial sutures close as age increases (fontanelle/soft spot)) • Epiphyses- growth plate closes as age increases • Ossification- the hardening of bone, increases as age increases

  3. DETERMINING SEX • Skull Differences- female is rounder and smaller • Supraorbital ridges more pronounced in males • Male chin is square, Female chin is round • Muscle Attachment (indentations) more pronounced in males

  4. DETERMINING SEX • Sacrum (wider and shorter in female) • Coccyx is more movable in female • Pelvis (OsPubis)Differences • 1-Width of pubic arch (female is larger) 2- Width of pubic body (female is wider)

  5. DETERMINING RACE- Skull Features • Caucasoid – (European, Middle Eastern, East Indian)- • Negroid- African, Aborigine, Melanesian • Mongoloid- Asian, Native American, Polynesian

  6. DETERMINING RACE- Skull Features • Examine: • Mandible (lower jaw bone) • Nasal aperture (nose bone) • Palate (roof of mouth) • Orbitals (eye sockets) • Zygomatic arches (cheek bones)

  7. DETERMINING RACE- Skull Features • Caucasoid: • 1-long , narrow nasal aperture 2- triangular palate 3- oval orbits 4- narrow zygomatic arches 5- narrow mandibles

  8. DETERMINING RACE- Skull Features • Mongoloid • 1- Rounded nasal aperture • 2- Parabolic palate • 3- Round orbits • 4- Wide zygomatic arches • 5- Pointed mandibles

  9. DETERMINING RACE- Skull Features • Negroid • 1- Wide nasal aperture • 2- Rectangular palate • 3- Square Orbits • 4- pronounced zygomatic arches

  10. DETERMINING HEIGHT • Male Humerus: Height (cm)= (Length of Humerus) x (2.89 + 70.64 Femur:

  11. DETERMINING HEIGHT • Forensic anthropologists can estimate a person’s stature (height) based on long bone measurements. • Different formulas are used for men and women since they have different proportions of long bones to total height. • Formulas are used to estimate height within 7.5 cm

  12. FEMALE • H= femur length x 2.21 + 61.41 • H= tibia length x 2.53 + 72.57 • H= humerus length x 2.79 + 71.48 • H= radius length X 3.87 + 73.50

  13. MALE • H= femur length X 2.23 + 69.08 • H= tibia length x 2.39 + 81.68 • H= humerus length X 2.89 + 70.64 • H= radius length x 3.65 + 80.40

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