NEET-PG 2012 Practice Questions

Q: Victim was strangled with elbow around neck. It is called as:

Mugging. ***Mugging*** - **Mugging** (also called "yoking" or "bar arm strangle") is the forensic medicine term for strangulation using the **arm or elbow encircling the neck**. - In this technique, the assailant typically approaches from behind and applies the forearm or crook of the elbow across the victim's throat, compressing the neck structures. - This method compresses the carotid arteries and jugular veins, leading to rapid unconsciousness and potential death from cerebral hypoxia. *Throttling* - **Throttling** specifically refers to manual strangulation using the **hands (fingers and thumbs)** to compress the neck. - The assailant applies direct pressure with their fingers on the front or sides of the victim's neck. - This differs from the scenario described, which involves the elbow/arm, not the hands. *Burking* - **Burking** is a historical method of murder involving suffocation by covering the mouth and nose while applying pressure to the chest. - Named after William Burke, this method was designed to leave minimal external marks on the body. - It does not involve neck compression or strangulation. *Garrotting* - **Garrotting** is strangulation using a **ligature** (rope, wire, cloth, or cord) tightened around the neck. - This involves an instrument rather than direct body contact. - It differs from mugging, which uses the arm/elbow without any intermediate object.

Q: An incised-looking laceration is seen in all except:

Chest. ***Chest*** - The skin and subcutaneous tissue over the chest are generally **pliable and abundant**, allowing tissues to stretch and tear irregularly rather than creating a clean, incised-looking wound. - Due to the **underlying musculature and lack of prominent bony structures** just beneath the skin, impacts tend to cause contusions, irregular lacerations, or deeper tissue damage rather than sharp, distinct cuts. *Shin* - The shin has minimal subcutaneous tissue and skin that is **tightly bound over the tibia**, a prominent bony structure. - Impacts here often cause the skin to be compressed against the bone, leading to a **clean, sharp tear that mimics an incised wound**. *Zygomatic bone* - The skin over the zygomatic bone (cheekbone) is **thin and adheres closely to the underlying bone**. - Trauma to this area can result in a **linear, incised-appearing laceration** due to the skin being split against the rigid bony surface. *Iliac crest* - Similar to the shin and zygomatic bone, the iliac crest is a **superficial bony prominence with thin skin and limited subcutaneous tissue**. - A blunt force impact can cause the skin to **split cleanly over the bone**, creating an incised-looking laceration.

Q: Foamy liver is seen in:

Putrefaction. ***Putrefaction*** - **Foamy liver** is a characteristic post-mortem finding in **putrefaction**, the process of post-mortem decomposition of body tissues. - **Gas-forming bacteria** (especially Clostridium species) produce gases like **hydrogen sulfide, methane, and carbon dioxide** that accumulate within the liver parenchyma. - This creates multiple **gas bubbles** throughout the liver tissue, giving it a characteristic **frothy or foamy appearance** on sectioning. - This is part of the broader putrefactive changes that include gas accumulation in blood vessels (marbling), body cavities, and soft tissues. *Arsenic poisoning* - Acute arsenic poisoning causes **fatty degeneration of the liver**, congestion, and characteristic gastrointestinal findings. - Post-mortem findings include **"rice water" stools**, gastroenteritis, and hepatic congestion, but NOT the foamy liver appearance. - The liver may show fatty changes and cellular necrosis, but gas bubble formation is not a characteristic feature. *Electrocution* - **Electrocution** causes death primarily through cardiac arrest or respiratory paralysis. - Post-mortem findings include **thermal burns** at entry and exit points, Joule burns, and sometimes arborescent markings. - It does not cause foamy liver; tissue changes are related to current passage and thermal effects. *Hanging* - **Hanging** results in **asphyxial death** with characteristic findings of mechanical asphyxia. - Typical findings include **ligature mark**, petechial hemorrhages, facial congestion, and cyanosis. - Does not cause foamy liver, as gas production within hepatic tissue is not a consequence of mechanical asphyxia.

Q: Cause of death for drowning in cold water:

Inability to breathe (asphyxia). ***Inability to breathe (asphyxia)*** - Drowning fundamentally involves **inhalation of water** into the airway, which prevents gas exchange in the lungs, leading to **asphyxia**. - In cold water, the initial gasp reflex can lead to rapid aspiration of water, causing immediate **laryngospasm** and closure of the airway, resulting in inability to breathe. - Asphyxia remains the **most common mechanism** across all types of drowning, including cold water cases. *Loss of consciousness due to hypoxia* - While **hypoxia** certainly occurs in drowning due to lack of gas exchange, loss of consciousness is a *consequence* of prolonged asphyxia, not the primary cause of death. - The immediate cause of death is the inability to oxygenate the blood due to water filling the lungs or severe laryngospasm. *Cardiac arrest due to vagal inhibition* - **Vagal inhibition** (also called **hydrocution** or **immersion syndrome**) is an important mechanism specifically in **cold water drowning**. - Sudden immersion in cold water can trigger massive vagal stimulation leading to immediate cardiac arrest (often asystole) before significant water aspiration occurs. - However, this mechanism occurs in a **minority of cold water drowning cases**, while asphyxia remains the predominant cause of death overall. *Cardiac arrest due to ventricular fibrillation* - **Ventricular fibrillation** can be a terminal event in drowning, often secondary to severe hypoxia and hypothermia, but it is usually not the initial or primary cause of death. - The cessation of breathing and subsequent lack of oxygen directly lead to organ failure, including cardiac dysrhythmias, rather than ventricular fibrillation being the independent initial event.

Q: Burking includes:

Chest compression and airway obstruction. ***Chest compression and airway obstruction*** - Burking is a **homicidal method** of suffocation that involves **covering the mouth and nose** (airway obstruction) combined with **compressing the chest or abdomen** to prevent breathing. - Named after **William Burke**, this technique was used to kill victims without leaving obvious signs of violence, making deaths appear natural. *Ligature strangulation* - Involves using a **cord, rope, or similar object** around the neck to compress blood vessels and/or airway. - Leaves characteristic **ligature marks** on the neck, which burking aims to avoid by using manual compression instead. *Drowning mechanism* - Involves **submersion in liquid** causing respiratory impairment and asphyxia. - Completely different mechanism from burking, which involves **manual suffocation** on dry land without water involvement. *Hanging technique* - Hanging involves **suspension of the body by the neck**, causing death through compression of neck structures. - This is completely different from burking and leaves distinct **hanging marks** on the neck, which burking specifically avoids.

Q: Ehrlichia chaffeensis is the causative agent of -

HME. ***HME (Human Monocytic Ehrlichiosis)*** - **Ehrlichia chaffeensis** is the primary causative agent of **Human Monocytic Ehrlichiosis**, a tick-borne illness. - This bacterium primarily infects **monocytes** and macrophages, leading to characteristic intracellular inclusions called **morulae**. *Glandular fever* - Glandular fever, also known as **infectious mononucleosis**, is predominantly caused by the **Epstein-Barr virus (EBV)**. - It is characterized by fever, sore throat, lymphadenopathy, and fatigue, and is not caused by bacteria. *HGE (Human Granulocytic Ehrlichiosis)* - **Human Granulocytic Ehrlichiosis (HGE)** is caused by **Anaplasma phagocytophilum**, not *Ehrlichia chaffeensis*. - HGE primarily targets **neutrophils** (granulocytes), differentiating it from HME which targets monocytes. *None of the options* - This option is incorrect because *Ehrlichia chaffeensis* is indeed the causative agent of HME, as described above.

Q: Hanging drop method is used for:

Trichomonas. ***Trichomonas*** - The **hanging drop method** is a highly effective technique for visualizing the characteristic **motility** of *Trichomonas vaginalis*. - This method allows for the observation of living, unstained organisms directly from clinical samples, making it valuable for rapid diagnosis. *Toxoplasma* - **Toxoplasma gondii** is an intracellular parasite best identified through serological tests for **antibodies** or molecular diagnostics like **PCR**. - It does not exhibit characteristic motility in a hanging drop preparation that would aid in its direct identification. *Cryptosporidium* - **Cryptosporidium** species are typically identified by detecting **oocysts** in stool samples, often using **acid-fast staining** or **immunofluorescence assays**. - Their small size and lack of distinctive motility under a hanging drop method make this technique unsuitable for their diagnosis. *Plasmodium* - **Plasmodium** species, the causative agents of malaria, are diagnosed by visualizing **parasites within red blood cells** on **Giemsa-stained blood smears**. - The hanging drop method would not effectively identify these intracellular parasites for malaria diagnosis.

Q: Rokitansky protuberances are seen in -

Teratoma. ***Teratoma*** - **Rokitansky protuberance** (mural nodule or dermoid plug) is a raised solid area found within a **mature cystic teratoma**, particularly in the ovary [1]. - It often contains various tissues derived from the three germ layers such as **hair**, **sebaceous glands**, bone, and teeth [3]. *Papillary carcinoma* - Characterized by **papillary projections** formed by tumor cells, often seen in thyroid, kidney, or ovary. - While it can have protuberances, these are **composed of malignant cells** and lack the diverse tissue components of a Rokitansky protuberance. *Epidermoid cyst* - A benign cyst lined by **stratified squamous epithelium** and filled with keratin debris, typically located in the skin or skull. - These cysts do not form internal protuberances with heterogeneous tissue types like those seen in teratomas. *Mucinous carcinoma* - A malignant tumor characterized by the production of **mucin**, often affecting the ovary, colon, or breast [2]. - Lesions are typically filled with mucinous material or present as mucinous masses, and do not contain the specific solid Rokitansky protuberance. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, p. 1034. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1033-1034. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Female Genital Tract Disease, pp. 480-481.

Q: Maximum duration of time is spent in NREM stage:

II. ***II*** - **NREM Stage II** constitutes the largest percentage of total sleep time, typically accounting for about 45-55% of an adult's sleep. - This stage is characterized by the presence of **sleep spindles** and **K-complexes** on an EEG, and it is a relatively stable period of sleep. *I* - **NREM Stage I** is the lightest stage of sleep, representing the transition from wakefulness to sleep. - It is the shortest stage, lasting only a few minutes, and is characterized by slow eye movements and a decrease in muscle tone. *III* - **NREM Stage III** (along with Stage IV in older classifications) is considered **slow-wave sleep** or deep sleep. - While crucial for restorative processes, Stage III does not account for the majority of total sleep time, typically being less than Stage II. *IV* - **NREM Stage IV** is the deepest stage of sleep, now often combined with Stage III as part of **slow-wave sleep**. - It involves the lowest brain wave activity and is difficult to awaken from, but its duration is significantly less than Stage II.

Question 1

Victim was strangled with elbow around neck. It is called as:

Accepted Answer

Mugging

Answer

Throttling

Answer

Burking

Answer

Garrotting

Question 2

What is the most reliable method to determine the time of death within the first 24 hours after death?

Accepted Answer

Algor mortis using rectal temperature with standard nomograms

Answer

Livor mortis is fixed and cannot be displaced after 8-12 hours

Answer

Rigor mortis appears first in smaller muscles and progresses to larger muscles

Answer

Putrefaction begins immediately after death in all environmental conditions

Question 3

An incised-looking laceration is seen in all except:

Accepted Answer

Chest

Answer

Shin

Answer

Zygomatic bone

Answer

Iliac crest

Question 4

Foamy liver is seen in:

Accepted Answer

Putrefaction

Answer

Arsenic poisoning

Answer

Electrocution

Answer

Hanging

Question 5

Cause of death for drowning in cold water:

Accepted Answer

Inability to breathe (asphyxia)

Answer

Loss of consciousness due to hypoxia

Answer

Cardiac arrest due to vagal inhibition

Answer

Cardiac arrest due to ventricular fibrillation

Question 6

Burking includes:

Accepted Answer

Chest compression and airway obstruction

Answer

Ligature strangulation

Answer

Drowning mechanism

Answer

Hanging technique

Question 7

Ehrlichia chaffeensis is the causative agent of -

Accepted Answer

HME

Answer

Glandular fever

Answer

HGE

Answer

None of the options

Question 8

Hanging drop method is used for:

Accepted Answer

Trichomonas

Answer

Toxoplasma

Answer

Cryptosporidium

Answer

Plasmodium

Question 9

Rokitansky protuberances are seen in -

Accepted Answer

Teratoma

Answer

Papillary carcinoma

Answer

Epidermoid cyst

Answer

Mucinous carcinoma

Question 10

Maximum duration of time is spent in NREM stage:

Accepted Answer

II

Answer

I

Answer

III

Answer

IV

NEET-PG 2012

Forensic Medicine

Microbiology

Pathology

Physiology