NEET-PG 2015 - Forensic Medicine Practice Questions

Q: Which of the following statements is true about cadaveric spasm?

Occurs immediately at the moment of death.. ***Occurs immediately at the moment of death.*** - **Cadaveric spasm** is a rare form of muscle stiffening that occurs **instantly** at the moment of death, without the flaccid stage seen in rigor mortis. - This is the **primary defining characteristic** that distinguishes cadaveric spasm from all other postmortem changes. - It is typically associated with deaths involving **intense emotional stress**, fear, or extreme physical exertion just before death. *May develop several hours after death.* - This statement describes **rigor mortis**, which is the stiffening of muscles that typically begins 2-6 hours after death. - Cadaveric spasm is distinct from rigor mortis due to its **immediate onset**. *Develops only in certain muscle groups.* - While this statement has some validity (cadaveric spasm is typically **localized** to specific muscle groups like hands or limbs that were under extreme tension), it is not the **best answer**. - The key distinguishing feature of cadaveric spasm is its **immediate onset at death**, not merely its localized distribution. - Many postmortem changes can be localized; what makes cadaveric spasm unique is its instantaneous occurrence. *Can affect any muscle in the body.* - This is too broad and inaccurate. Cadaveric spasm is characteristically **localized or regional**, not generalized. - It typically involves muscles that were under **extreme voluntary contraction** at the moment of death (e.g., clutching a weapon, grasping an object). - Unlike rigor mortis, which eventually affects all muscles, cadaveric spasm remains confined to specific muscle groups.

Q: For autopsy, stomach is opened through -

Greater curvature. ***Greater curvature*** - Opening the stomach along the **greater curvature** allows for a complete and unobstructed view of the entire gastric mucosa. - This approach minimizes damage to the medically significant **lesser curvature**, which is important for identifying conditions like ulcers or tumors that often occur in that region. *Lesser sac* - The **lesser sac** is a peritoneal cavity space behind the stomach, not an anatomical part of the stomach itself to be opened. - Accessing the stomach via the lesser sac is not a surgical approach for opening the gastric lumen. *Greater sac* - The **greater sac** is the main peritoneal cavity, referring to the general abdominal space, not a specific part of the stomach wall. - This option describes a general anatomical area rather than a specific incision line for the stomach. *Lesser curvature* - Opening the stomach along the **lesser curvature** is generally avoided in autopsy. - This area is prone to various pathologies like ulcers and gastric cancer, and incising it would disrupt potential diagnostic findings.

Q: In which condition is adipocere formation most likely to occur?

Dead body buried in damp, clay soil. **Dead body buried in damp, clay soil** - **Adipocere formation**, also known as "grave wax," is a post-mortem change where **body fats** hydrolyze into fatty acids and ammonia, forming a waxy, soap-like substance. - This process requires specific conditions: a **moist, anaerobic environment**, and temperatures above freezing, often found in **damp, clay soil** or submerged in water. *Dead body exposed to air* - Exposure to air promotes **putrefaction** (decomposition by bacteria and enzymes) and **mummification** (drying out of tissues), rather than adipocere formation. - An **aerobic environment** does not support the chemical reactions necessary for fat hydrolysis into adipocere. *Burial in dry hot air* - High temperatures and dry air promote **desiccation** and **mummification**, leading to the preservation of tissues by drying. - The lack of moisture in a dry environment inhibits the hydrolysis of fats required for adipocere formation. *None of the options* - This option is incorrect because the conditions described in "Dead body buried in damp, clay soil" are ideal for adipocere formation.

Q: Length of the fetus is 40 cm. What would be the age of gestation?

8 months. ***8 months*** - At **8 months** of gestation (approximately **32 weeks**), the average crown-heel length of a fetus is about **40-43 cm**. - Foetal growth charts and developmental milestones indicate a close correlation between this length and the corresponding gestational age. *4 months* - At **4 months** of gestation (approximately **16 weeks**), the fetus is much smaller, typically around **12-15 cm** in crown-heel length. - Significant organ development is underway, but growth in length is not as rapid as in later trimesters. *6 months* - At **6 months** of gestation (approximately **24 weeks**), the fetus measures around **28-30 cm** in crown-heel length. - This stage is marked by significant weight gain and further development of organs, but it is still short of 40 cm. *7 months* - At **7 months** of gestation (approximately **28 weeks**), the fetus's crown-heel length is typically around **35-38 cm**. - While closer to 40 cm, it usually falls slightly short, with the average 40 cm length being more characteristic of 8 months.

Q: Bacteria most commonly involved in bowel decomposition after death is?

Clostridium perfringens. ***Clostridium perfringens*** - This bacterium is a ubiquitous **anaerobe** in the gut and is known for its rapid proliferation after death, producing gases that contribute to **bloating and decomposition**. - It is a primary cause of **gas gangrene** in living individuals, reflecting its tissue-destructive capabilities, which extend to post-mortem changes. - Produces large amounts of **hydrogen and CO2**, making it the most significant contributor to post-mortem gas formation and putrefaction. *Streptococcus pyogenes* - While a significant pathogen in life, causing conditions like **strep throat** and **necrotizing fasciitis**, it is not the primary agent of putrefaction. - Its role in post-mortem decomposition is generally less prominent compared to anaerobic gut flora. *Pseudomonas aeruginosa* - This bacterium is an opportunistic pathogen often associated with infections in immunocompromised individuals or in healthcare settings. - It is not typically identified as the most common or primary bacterium involved in the initial stages of post-mortem **bowel decomposition**, though it can be present in later stages. *Escherichia coli* - While *E. coli* is abundant in the bowel and participates in post-mortem decomposition, it is not the **most common** agent responsible for gas production and tissue decomposition. - *Clostridium perfringens* proliferates more rapidly and produces significantly more gas, making it the predominant bacterium in bowel putrefaction.

Q: Which of the following statements best describes a key characteristic of fingerprint development?

Fingerprints are fully formed before birth.. ***Fingerprints are fully formed before birth.*** - Fingerprints begin to develop during the **fetal stage**, specifically between the 10th and 17th weeks of gestation. - Once formed, their unique ridge patterns remain **unchanged throughout life**, except for changes due to injury or disease. *DNA analysis is the most specific method of identification.* - While **DNA analysis** is a highly specific method of identification, the statement refers to its specificity generally, not as a characteristic of fingerprint development itself. - Fingerprints are a distinct form of identification based on unique **dermal ridge patterns**, independent of genetic material. *The most common type of fingerprint is loops.* - It is true that **loops** are indeed the most common type of fingerprint pattern, occurring in about 60-70% of the population. - However, this statement describes a characteristic of fingerprint patterns, not a key characteristic of their **development** or formation. *None of the options are true.* - This option is incorrect because the statement that **fingerprints are fully formed before birth** is a key characteristic of fingerprint development. - This option would only be correct if all other statements were false.

Q: Which of the following is not a feature of postmortem staining?

Occurs immediately after death. ***Occurs immediately after death*** - **Livor mortis** (postmortem staining/lividity) does NOT occur immediately after death - it typically begins **20-30 minutes** after death and becomes fully developed within **6-12 hours** - This is the correct answer as it represents a feature that is NOT characteristic of postmortem staining - The delay occurs because it takes time for blood to settle in capillaries due to gravity after circulation stops *Common in dependent part* - This IS a hallmark feature of postmortem staining - Gravity causes blood to pool in the **lowest parts of the body** (dependent areas) - Areas of pressure (where body contacts surface) appear pale due to **capillary compression** *Appears uniformly throughout the body* - This is also NOT a feature of postmortem staining (could be considered another correct answer) - Postmortem staining is **localized to dependent areas**, not uniform throughout - The distribution pattern helps determine body position after death in forensic investigations *Margins are sharp* - Postmortem lividity typically has **ill-defined, diffuse margins** rather than sharp borders - The transition between affected and unaffected areas is gradual - However, this is less definitively wrong compared to the timing and uniformity statements

Q: Base of sphenoid fuses with occiput at the age of -

20 years. ***20 years*** - The **spheno-occipital synchondrosis** typically fuses by the age of **20 to 25 years**, marking the cessation of growth in the cranial base. - This fusion is an important indicator of skeletal maturity and is often used in **forensic anthropology** for age estimation. *30 years* - Fusion of the **spheno-occipital synchondrosis** beyond the early twenties is considered late and is not the typical age for this event. - By 30 years, most cranial sutures and synchondroses are already fused. *40 years* - At 40 years of age, the **spheno-occipital synchondrosis** would have been completely fused for many years, making this an incorrect age for the fusion process itself. - This age is well past the usual developmental timeframe for cranial base closure. *50 years* - Fusion at 50 years would be an **anomalous finding** as this synchondrosis is known to fuse much earlier in life. - By this age, the skull is fully mature, and fusion events of this nature have long since completed.

Q: Tache noire de la sclera is a postmortem finding related to which of the following?

The eye. ***The eye*** - **Tache noire de la sclera** is a postmortem phenomenon characterized by a **black spot on the sclera**, resulting from the drying out of the globe after death. - This finding is important in **forensic pathology** as it can help in estimating the postmortem interval if the eyes are open. *Muscle tissue* - Postmortem changes in muscle tissue include **rigor mortis** (stiffening of muscles) and **livor mortis** (discoloration of skin due to blood pooling), neither of which are described as "tache noire de la sclera." - These changes relate to muscle biochemistry and gravity, not specific changes to the sclera. *Hair follicles* - Hair follicles are not associated with "tache noire de la sclera." Postmortem changes related to hair would involve **hair growth assessment** or decomposition changes affecting the scalp. - The phenomenon described is specific to ocular structures. *Skin* - While skin shows prominent postmortem changes such as **livor mortis**, **marbling**, and **decomposition**, these are distinct from tache noire de la sclera. - Tache noire specifically refers to the **drying and darkening of the exposed sclera**, not cutaneous changes.

Question 1

Which of the following statements is true about cadaveric spasm?

Accepted Answer

Occurs immediately at the moment of death.

Answer

May develop several hours after death.

Answer

Develops only in certain muscle groups.

Answer

Can affect any muscle in the body.

Question 2

For autopsy, stomach is opened through -

Accepted Answer

Greater curvature

Answer

Lesser sac

Answer

Greater sac

Answer

Lesser curvature

Question 3

In which condition is adipocere formation most likely to occur?

Accepted Answer

Dead body buried in damp, clay soil

Answer

Dead body exposed to air

Answer

Burial in dry hot air

Answer

None of the options

Question 4

Length of the fetus is 40 cm. What would be the age of gestation?

Accepted Answer

8 months

Answer

4 months

Answer

6 months

Answer

7 months

Question 5

Bacteria most commonly involved in bowel decomposition after death is?

Accepted Answer

Clostridium perfringens

Answer

Streptococcus pyogenes

Answer

Pseudomonas aeruginosa

Answer

Escherichia coli

Question 6

Which of the following statements best describes a key characteristic of fingerprint development?

Accepted Answer

Fingerprints are fully formed before birth.

Answer

DNA analysis is the most specific method of identification.

Answer

The most common type of fingerprint is loops.

Answer

None of the options are true.

Question 7

Which of the following is not a feature of postmortem staining?

Accepted Answer

Occurs immediately after death

Answer

Common in dependent part

Answer

Appears uniformly throughout the body

Answer

Margins are sharp

Question 8

What is defined as a negative autopsy?

Accepted Answer

No cause of death is found after both gross and histopathological examination.

Answer

Cause is apparent on gross examination but not on histopathological examination.

Answer

Gross findings are minimal.

Answer

Cause is apparent on gross examination but not found due to constraints on the part of the doctor.

Question 9

Base of sphenoid fuses with occiput at the age of -

Accepted Answer

20 years

Answer

30 years

Answer

40 years

Answer

50 years

Question 10

Tache noire de la sclera is a postmortem finding related to which of the following?

Accepted Answer

The eye

Answer

Muscle tissue

Answer

Hair follicles

Answer

Skin

NEET-PG 2015 — Forensic Medicine