Forensic Anthropology: Applied Osteology and Pathological Markers

This second easy-level mock builds on foundational vocabulary to cover applied osteological methods, skeletal pathology, site recovery, and identification techniques — all essential for NFSU MSc and FACT examination preparation. Questions focus on clinically meaningful distinctions that examiners test: how ante-mortem conditions differ from post-mortem changes, how specific techniques contribute to identification, and the reasoning behind each skeletal method.

Questions cover: the Phenice three-trait method for pelvic sex determination (ventral arc + subpubic concavity + medial ISP ramus; 96% accuracy), definition and forensic significance of epiphyses (secondary ossification centres fusing at known ages; age estimation ladder), mandibular sex determination (mental eminence + gonial angle + corpus robusticity), enthesophytes as occupational stress markers (bony projections at muscle and tendon attachments from repeated loading), dorsal pitting and current consensus on parturition unreliability (found in nulliparous females and males; document but do not interpret), periostitis as an ante-mortem vital bone reaction (woven new bone on outer cortex; bone was alive and responding), forensic skeletal recovery methods (grid + stratigraphic excavation + fine sieving + 3D mapping), osteoporosis in skeletal remains (thinned cortex + trabecular rarefaction + vertebral crush fractures; supplementary age evidence), Schmorl's nodes (disc herniation through vertebral end-plate; degenerative disc disease + mechanical spinal stress), ante-mortem vs post-mortem tooth loss (resorbed rounded socket vs intact sharp socket), Pott's disease (spinal TB; anterior vertebral body destruction + gibbous deformity; common in India), unique skeletal features for positive identification (healed fractures + surgical implants + congenital anomalies + dental work; all require antemortem records), greenstick fractures in child bone (high collagen = flexibility = incomplete fracture; one cortex fractures, one bends), nasal aperture ancestry classification (leptorrhine below 47 vs mesorrhine vs platyrrhine above 51; nasal index = breadth/height x 100), commingled remains multi-method sorting (pair-matching + osteometric + taphonomy + DNA), syphilis in bone (sabre tibia + caries sicca; pathognomonic treponemal skeletal disease), skull-photograph superimposition (corroborative; can exclude but not positively identify), mastoid process for sex determination (males larger and more projecting; five-point scale; one of five skull sex features), plant root etching vs knife cut marks (dendritic + sinuous + irregular vs single + linear + consistent width), foramen magnum forensic significance (ancestry estimation + brainstem trauma + Hindu cremation ritual modification recognition), osteometric sorting of commingled remains (proportional size matching; probabilistic; DNA confirms), biological sex vs gender (sex from skeleton dimorphism; gender is social construct; report distinction), DISH (flowing anterior longitudinal ligament ossification at least 4 vertebrae; spares discs + facets; older male + metabolic conditions), Trotter and Gleser limitations for Indian populations (American formulae overestimate Indian stature; use Singh and Sohal 1966), dental attrition for adult age estimation (enamel wear to dentine exposure to secondary dentine; diet affects rate), chop wound vs knife cut mark on bone (wide kerf + crushed margins + secondary fractures vs narrow V-shaped + clean walls), sternum in sex and age estimation (length + width for sex; sternebrae fusion for age; manubriosternal fusion in older adults), and dental development chronology for juvenile age estimation (Demirjian A–H stages; approximately 1–2 year accuracy; primary complete 30 months; third molar 17–21 years).

Topics covered:

• Sex determination: Phenice method, mandible, mastoid process, sternum, biological sex vs gender
• Age estimation: epiphyses, dental attrition, dental development, Schmorl's nodes, osteoporosis, DISH, sternum
• Pathology and health: periostitis, Pott's disease, DISH, osteoporosis, syphilis, enthesophytes, Schmorl's nodes
• Trauma and marks: chop vs knife cut, root etching vs cut marks, greenstick fractures
• Identification: positive ID unique features, skull superimposition, commingled sorting, osteometric sorting
• Methods and context: forensic recovery, Trotter and Gleser limitations, nasal index classification

Each question cites Byers' Introduction to Forensic Anthropology 5th edition. Allow 30 minutes.