Forensic Anthropology Cheat Sheet

The core ideas of Forensic Anthropology distilled into a single, scannable reference — perfect for review or quick lookup.

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Quick Reference

Biological Profile

A composite description of a deceased individual derived from skeletal analysis, typically including estimates of age at death, biological sex, stature, and ancestral affinity. It is the primary tool forensic anthropologists use to narrow the pool of potential identifications.

Osteology

The scientific study of bones, including their structure, function, development, and pathology. In forensic contexts, osteology provides the foundational knowledge needed to interpret skeletal remains for identification and trauma analysis.

Taphonomy

The study of what happens to organisms after death, including decomposition, scavenging, weathering, and other postmortem processes that alter remains. Forensic taphonomy helps estimate the postmortem interval and reconstruct the circumstances of deposition.

Skeletal Trauma Analysis

The examination of fractures, cut marks, and other injuries on bone to determine whether they occurred before death (antemortem), around the time of death (perimortem), or after death (postmortem). This analysis is essential for establishing cause and manner of death.

Sex Estimation from the Skeleton

The process of determining biological sex from skeletal remains using morphological features of sexually dimorphic bones, particularly the pelvis and skull. The pelvis is considered the most reliable indicator because of its role in childbirth.

Age-at-Death Estimation

Methods used to estimate how old an individual was when they died, based on developmental markers in subadults (such as epiphyseal fusion and dental eruption) and degenerative changes in adults (such as pubic symphysis and auricular surface morphology).

Ancestry Estimation

The assessment of population affinity or geographic ancestry from skeletal remains using cranial morphology and metric analysis. This estimation helps narrow identification by suggesting the broad geographic origin of the individual.

Stature Estimation

The calculation of an individual's living height from the measurements of long bones, particularly the femur and tibia. Regression equations developed from reference populations are applied to bone lengths to produce a stature range.

Postmortem Interval (PMI)

The time elapsed since death. Forensic anthropologists contribute to PMI estimation through analysis of skeletal weathering, taphonomic changes, and associated entomological or botanical evidence when soft tissue is no longer present.

Forensic Facial Reconstruction

A technique used to approximate the facial appearance of a deceased individual from their skull, using known tissue-depth data and anatomical landmarks. It can be performed in two or three dimensions using clay or digital methods.

Key Terms at a Glance

Antemortem:Occurring before death. In skeletal analysis, antemortem injuries show evidence of healing or biological response.

Auricular Surface:The ear-shaped articular surface on the ilium where the sacrum joins the pelvis. Degenerative changes to this surface are used for adult age estimation.

Biological Profile:A composite skeletal assessment including estimates of age at death, sex, stature, and ancestry used to help identify unknown remains.

Blunt Force Trauma:Injury to bone caused by impact with a broad, relatively low-velocity object, producing depressed fractures, radiating fractures, and concentric fractures.

Commingling:The mixing of skeletal elements from two or more individuals, requiring careful sorting through visual pair-matching, osteometric analysis, and sometimes DNA testing.

Cortical Bone:The dense outer layer of bone that provides structural strength. Its thickness and microstructure can be assessed histologically for age estimation.

Cranial Suture:Fibrous joints between the bones of the skull that progressively fuse with age. Their degree of closure has been used, with limited reliability, for age estimation.

Decomposition:The biological and chemical breakdown of soft tissues after death, progressing through stages from fresh to skeletonized. Rate is influenced by temperature, moisture, and access by insects.

Epiphysis:The rounded end of a long bone, initially separated from the shaft (diaphysis) by a growth plate. The timing of epiphyseal fusion is a key indicator for subadult age estimation.

FORDISC:A computer program using discriminant function analysis of skeletal measurements to classify unknown remains by ancestry and sex based on reference population data.

Forensic Facial Reconstruction:A technique that approximates the facial appearance of an unidentified person from their skull, using tissue-depth markers and knowledge of facial anatomy.

Forensic Odontology:The application of dental science to legal investigations, including identification through dental records, bite mark analysis, and age estimation from dental development.

Greater Sciatic Notch:A notch on the posterior ilium whose width is sexually dimorphic: wider in females and narrower in males. It is one of the key pelvic features used in sex estimation.

Histomorphometry:The microscopic analysis of bone thin-sections to count osteon density and other features for age estimation. Useful when macroscopic aging landmarks are unavailable.

Isotope Analysis:The measurement of stable isotope ratios (strontium, oxygen, carbon, nitrogen) in bone and dental enamel to infer geographic origin, migration patterns, and diet.

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