NEET-PG 2013 - Forensic Medicine Practice Questions

Q: Postmortem caloricity may be seen in all the following causes of death, except:

Barbiturates poisoning. ***Barbiturates poisoning*** - **Barbiturate poisoning** is a **CNS depressant** that typically leads to **hypothermia**, not postmortem caloricity, due to central nervous system depression and reduced metabolic rate. - The body's temperature tends to fall faster than normal after death in such cases. - Barbiturates suppress the thermoregulatory center and decrease metabolic activity. *Septicemia* - **Septicemia** often causes **hyperpyrexia** (high fever) ante-mortem due to systemic inflammation and infection. - This elevated core temperature can persist for a short period after death, resulting in **postmortem caloricity**. - The inflammatory response generates significant heat that remains temporarily post-death. *Strychnine poisoning* - **Strychnine poisoning** leads to severe **convulsions** and muscle rigidity due to inhibition of inhibitory neurotransmitters. - Sustained periods of intense muscle activity generate excessive **heat** ante-mortem, which is retained postmortem, causing caloricity. - The violent convulsions and opisthotonus posture produce marked heat generation. *Tetanus* - **Tetanus** is characterized by muscle spasms and rigidity caused by the **tetanospasmin toxin** blocking inhibitory signals. - The prolonged and intense **muscle contractions** before death generate a large amount of heat, contributing to postmortem caloricity. - Similar mechanism to strychnine but caused by bacterial toxin rather than plant alkaloid.

Q: Which of the following is NOT a part of a firearm?

Carburetor. ***Carburetor*** - A **carburetor** is a device that mixes air and fuel for internal combustion engines and is not found in firearms. - Its function is to **vaporize fuel** and combine it with air before it enters the engine's cylinders. *Muzzle* - The **muzzle** is the front end of the barrel where the projectile exits. - It defines the **exit point** of the bullet from the firearm. *Bolt* - The **bolt** is a critical component in many firearms, which locks the cartridge in the chamber during firing. - It also aids in **extracting the spent casing** and loading a new round. *Extractor* - The **extractor** is a part of the bolt assembly that grasps the rim of a cartridge case. - Its primary function is to **pull the spent casing** out of the chamber after firing.

Q: Paltauf's hemorrhages are seen in:

Lungs. ***Lungs*** - **Paltauf's hemorrhages** (also called **Paltauf's spots**) are small, pinpoint **petechial hemorrhages** typically found in the **visceral pleura of the lungs**. - They are a **classic post-mortem finding in cases of drowning**, representing subpleural hemorrhages associated with **emphysema aquosum** (overinflation and rupture of alveoli). - These hemorrhages are pathognomonic of drowning and should not be confused with Tardieu spots seen in mechanical asphyxia. *Heart* - Hemorrhages in the heart typically refer to **myocardial hemorrhages** secondary to conditions like **myocardial infarction** or trauma. - These are distinct from Paltauf's hemorrhages, which are specifically pleural petechiae in drowning. *Liver* - Liver hemorrhages are usually associated with **trauma**, **ruptured hepatic adenoma**, or severe **coagulopathies**. - Such hemorrhages are not referred to as Paltauf's and have different etiologies. *Brain* - Brain hemorrhages, such as **subarachnoid**, **intracerebral**, or **epidural hematomas**, occur within or around the brain tissue. - While brain hemorrhages can be a cause of death, they are anatomically and phenotypically distinct from the pleural petechiae of Paltauf seen in drowning.

Q: Which of the following snakes is MOST known for venom containing neurotoxins?

Krait. ***Krait*** - Kraits (Bungarus species) are **MOST known for pure neurotoxic venom** with minimal or no local effects at the bite site. - Their venom contains **presynaptic and postsynaptic neurotoxins**, causing classic features of **flaccid paralysis**, ptosis, and respiratory failure. - **Clinical hallmark**: Often described as the prototype of **pure neurotoxic envenomation** with absent local signs (no swelling, no pain). - Among Indian snakes, kraits have the **highest case fatality rate** due to potent neurotoxicity. *Cobra* - Cobras (Naja species) do have **neurotoxic venom** causing paralysis and respiratory failure. - However, cobra venom contains **significant cytotoxic components** causing marked **local tissue necrosis**, pain, and swelling at the bite site. - This mixed venom profile (neurotoxic + cytotoxic) makes it less "purely" neurotoxic compared to kraits. *Sea snake* - Sea snakes have neurotoxic venom causing myotoxicity and paralysis. - Bites are **rare** due to limited human contact and docile nature. - Not as clinically recognized in Indian medical practice compared to terrestrial elapids. *Viper* - Vipers (Russell's viper, Saw-scaled viper) have predominantly **hemotoxic and cytotoxic venom**. - Cause **coagulopathy**, hemorrhage, tissue necrosis, and acute kidney injury. - **Not neurotoxic** - this is the key differentiating feature from elapids (kraits, cobras).

Q: Cobras belong to:

Elapidae. ***Elapidae*** - The family **Elapidae** includes cobras, mambas, kraits, and coral snakes, all of which are recognized by their **fixed front fangs** and potent neurotoxic venom. - Elapid venom typically affects the **nervous system**, causing paralysis and respiratory failure. *Colubridae* - This is the **largest snake family**, but most species are **non-venomous** or have mild venom and rear-fanged dentition. - Examples include rat snakes, garter snakes, and king snakes, which are generally not considered as dangerous as elapids. *Boidae* - Boidae are a family of **non-venomous, constricting snakes** that include boas, pythons, and anacondas. - They kill their prey by **suffocation** rather than venom. *Viperidae* - This family includes vipers and pit vipers, characterized by their **long, hinged fangs** that fold back when not in use. - Their venom is often **hemotoxic**, causing tissue damage and bleeding, and includes species like rattlesnakes and adders.

Q: Among the following countries, the first systematic fingerprint identification service was established in:

India. ***India*** - The **first systematic fingerprint identification service** was established in **Calcutta (now Kolkata), India in 1897** by Sir Edward Henry while he was Inspector General of Police in Bengal. - Henry developed the **Henry Classification System** in India, which became the standard fingerprint classification method worldwide. - This preceded the establishment of similar services in other countries, making it the first organized, systematic fingerprint bureau for criminal identification. *England* - England established its fingerprint bureau at **Scotland Yard in 1901**, four years after India. - Sir Edward Henry, who had developed the system in India, became Commissioner of the Metropolitan Police and established the Fingerprint Branch in London. - While England popularized fingerprint identification globally, it was not the first to establish a systematic service. *China* - **Ancient China** has historical evidence of using fingerprints on documents and clay seals for identification purposes dating back thousands of years. - However, this was not a systematic, scientific service for criminal identification in the modern sense with a classification system and organized bureau. *Singapore* - Singapore's forensic services, including fingerprint identification, developed later in the 20th century. - It followed the advancements pioneered by India and England and was not among the first countries to establish such services.

Q: 'Phossy jaw' is seen in chronic poisoning with:

Phosphorus. ***Phosphorus*** - **"Phossy jaw"** refers to the severe osteonecrosis of the jaw, historically seen in workers exposed to **white or yellow phosphorus**, particularly in the matchstick industry. - Exposure to **elemental phosphorus** leads to the destruction of bone tissue, infection, and eventually necrosis of the jawbone. *Arsenic* - Chronic arsenic poisoning primarily affects the **skin (hyperkeratosis, hyperpigmentation)**, and multiple organ systems. - It is not associated with **osteonecrosis of the jaw**. *Thallium* - Thallium poisoning is characterized by **alopecia**, **neuropathy**, and gastrointestinal symptoms. - It does not cause **"phossy jaw"**. *Datura* - Datura refers to a genus of plants containing **tropane alkaloids**, which cause anticholinergic toxidrome. - Symptoms include **dilated pupils**, dry mouth, hallucinations, and tachycardia, not jaw necrosis.

Q: What is the characteristic pupil condition seen in opium poisoning?

Miosis. ***Miosis*** - **Opioids** stimulate mu-opioid receptors in the brainstem, leading to increased parasympathetic outflow to the **oculomotor nerve**. - This stimulation causes constriction of the **pupillary sphincter muscle**, resulting in pinpoint pupils. *Mydriasis* - **Mydriasis** (dilated pupils) is typically caused by anticholinergic agents, sympathetic stimulation, or certain stimulants, which are not characteristic of opium poisoning. - While dilated pupils can occur in severe terminal hypoxia due to brainstem damage, this is not the initial or characteristic presentation of opioid toxicity. *No change* - **Opioid poisoning** reliably causes a distinct pupillary response, making "no change" an incorrect option for characteristic presentation. - The pupillary response is a crucial diagnostic sign for opioid intoxication. *Irregular* - **Irregular pupils** (dyscoria) are usually associated with direct ocular trauma, neurological conditions affecting specific parts of the iris, or certain inflammatory conditions of the eye. - This is not a typical finding in **opioid toxicity**, which causes symmetrically constricted pupils.

Q: Borax causes which of the following effects?

Causes gastrointestinal irritation (side effect). ***Causes gastrointestinal irritation (side effect)*** - Borax, specifically its component **boric acid**, is rapidly absorbed through the **gastrointestinal tract** and can cause symptoms like nausea, vomiting, and diarrhea even in small amounts. - This **gastrointestinal irritation** is a common sign of acute borax toxicity. *Induces uterine contractions (labor-inducing)* - While certain substances can induce uterine contractions, **borax is not known** or traditionally used for this purpose. - It is **not an oxytocic agent** and does not act on uterine smooth muscle in a way that would induce labor. *Irritates genitourinary tract (side effect)* - Although borax can be toxic, its primary route of significant irritation and toxicity is not typically the **genitourinary tract** in the way implied for adverse effects. - While it can be absorbed through mucous membranes, the genitourinary tract is not its primary target for **direct irritant effects** in systemic exposure. *Traditionally used to stimulate menstrual flow* - There is **no reliable scientific or traditional medical evidence** to support the use of borax to stimulate menstrual flow. - Substances used for this purpose, known as **emmenagogues**, are typically herbal or pharmaceutical preparations, and borax is **not among them**.

Q: Cafe coronary commonly occurs when a person is:

Intoxicated. ***Intoxicated*** - **Intoxication**, particularly with alcohol, impairs the **gag reflex** and **swallowing coordination**, increasing the risk of aspiration and airway obstruction [1]. - Reduced awareness and slowed reactions due to intoxication make it difficult for an individual to clear their airway effectively if food becomes lodged, leading to a "cafe coronary" [1]. *Eating meat* - While meat can be a common culprit in cafe coronary incidents due to its **fibrous texture** and potential for large boluses, it's not the primary underlying condition [1], [2]. - The act of eating meat itself does not inherently cause the impaired protective reflexes seen in cafe coronary. *Eating fish* - Fish typically presents a relatively **low risk** for airway obstruction compared to other foods, as it is generally softer and breaks down more easily. - Although bones can be an issue, the specific "cafe coronary" scenario refers to significant airway obstruction by a bolus, not usually associated with typical fish consumption [2]. *Eating fatty food* - Eating fatty foods primarily relates to **digestive issues** or cardiovascular risk, not typically to acute airway obstruction. - Fatty foods do not inherently impair swallowing reflexes or significantly increase the risk of aspiration in the same way intoxication does.

Question 1

Postmortem caloricity may be seen in all the following causes of death, except:

Accepted Answer

Barbiturates poisoning

Answer

Septicemia

Answer

Strychnine poisoning

Answer

Tetanus

Question 2

Which of the following is NOT a part of a firearm?

Accepted Answer

Carburetor

Answer

Muzzle

Answer

Bolt

Answer

Extractor

Question 3

Paltauf's hemorrhages are seen in:

Accepted Answer

Lungs

Answer

Heart

Answer

Liver

Answer

Brain

Question 4

Which of the following snakes is MOST known for venom containing neurotoxins?

Accepted Answer

Krait

Answer

Sea snake

Answer

Cobra

Answer

Viper

Question 5

Cobras belong to:

Accepted Answer

Elapidae

Answer

Colubridae

Answer

Boidae

Answer

Viperidae

Question 6

Among the following countries, the first systematic fingerprint identification service was established in:

Accepted Answer

India

Answer

England

Answer

China

Answer

Singapore

Question 7

'Phossy jaw' is seen in chronic poisoning with:

Accepted Answer

Phosphorus

Answer

Arsenic

Answer

Thallium

Answer

Datura

Question 8

What is the characteristic pupil condition seen in opium poisoning?

Accepted Answer

Miosis

Answer

Mydriasis

Answer

No change

Answer

Irregular

Question 9

Borax causes which of the following effects?

Accepted Answer

Causes gastrointestinal irritation (side effect)

Answer

Induces uterine contractions (labor-inducing)

Answer

Irritates genitourinary tract (side effect)

Answer

Traditionally used to stimulate menstrual flow

Question 10

Cafe coronary commonly occurs when a person is:

Accepted Answer

Intoxicated

Answer

Eating meat

Answer

Eating fish

Answer

Eating fatty food

NEET-PG 2013 — Forensic Medicine