Forensic medicine | Master Of Medicine

Category Archives: Forensic medicine

IPC sections relevant for a medical practitioner.

Indian Penal Code and related questions are frequently repeated in MCQ exams.So having good knowledge is important during practice and for entrance exams too.

IPC 82 -Child <7yrs incapable of committing a crime

IPC 83 – Children 7-12yrs can be punished for crime

IPC 84 - Criminal responsibility of the insane

IPC 191 – Defenition of perjury

IPC 193 – Punishment for Perjury

IPC 299 - Defines culpable homicide

IPC 300 -Defines murder

IPC 302 -Punishment for murder

IPC 304 -Punishment for culpable homicide

IPC 304A -Criminal negligence

IPC 304B-Dowry death

IPC 319 -Hurt

IPC 320 – Grievous hurt

IPC 325 - Punishment for grievous hurt

IPC 374 – Defenition of rape

IPC 376 -Punishment for rape

IPC 377 – Unnatural sexual offences

Forensic medicine important points

Types of Hanging

Typical-Knot at the occiput

Atypical-Knot at any place other than occiput

Complete-Fully suspended in air

Partial-Feet touching the ground

Homicide

Garroting- Ligature strangulation from behind

Mugging- By holding neck in the bend of elbow

Burking-Smothering+Traumatic asphyxia

Force required to obstuct trachea-15kg

Fresh water and salt water drowning

Fresh water drowning-Hemodilution,hyponatremia,Hyperkalemia

Salt water drowning-Pulmonary edema,hemoconcentration

Hydrocution- No specific postmortem finding

Water in sphenoidal air sinusĀ  is a very good sign in drowning.

Rule of Hasse

To find intrauterine age of fetus

Upto 5 months square root of length

After 5 months multiply by 5.

Ossification centres

Viability attained by 7 months/210 days

Ossification center in calcaneum-5 months

Ossification center in talus-7 months

Ossification center in cuboid-9 months

Strenum- 5 ossification centers(66779) if atleast 3 is present, fetus is viable.
Testamentary capacity-Ability to make a will

Caspers dictum

Rate of decomposition in soil water and air- 1:2:8

“According to an old rule of thumb (Casper’s dictum) one week of
putrefaction in air is equivalent to two weeks in water, which is equivalent to eight
weeks buried in soil, given the same environmental temperature”.

Criminal responsibility of insane

Durham’s rule

Currens rule

Mcnaughtens rule

First permanent tooth to erupt-First molar

Thanatology-Science of death

Sommer’s movement-Due to shortening and stiffening of muscles in rigor mortis.

Proximal 2 cm of anterior descending branch-Commonest site of MI

Rigor mortis is due to-reduction of ATP

Marbling-Branching pattern of veins after death-Can be seen by 36 hours

Clostridium welchii-Adipocere, foamy liver.

Evidence of recent sex in male-Lugol’s iodine test.

Chemical tests

Seminal stains-Florence,acid phosphatase test,Barberio test

Blood stains-Takayama test

Blood grp of old blood stain-Absorption elution technique

Christmas Y stain-Detects sperm in vaginal mucosa.

Nystens Law-Spread of rigor mortis-proximo distally.

Sex determination

  1. Ischiopubic index
  2. Sacral index
  3. Corporobasal index(Diameter of sacrum)
  4. Medullary index(Bone)

Race determination

  1. Brachial index(radius/humerus)
  2. Crural index(tibia/femur)
  3. Humerofemoral index
  4. Cephalic index

Age determination

  1. Costochondral junction
  2. Pubic symphisis
  3. Gustafson’s method

Medullary index of hair-Species determination

Fragmented medulla-negroid

Humans have narrow medulla-type 7.

Cephalic index

70-74.9-Dolicocephalic(Negroes,aryans)

75-79.9-Mesaticephalic(Europeans,chinese)

80-84.9-Brachycephalic(mongolians)

Bertillion system-Antopometry

Dalton system-Dactylography

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