NEET-PG 2013 Practice Questions

Q: Kennedy phenomenon is seen in:

Gunshot injury. ***Gunshot injury*** - The **Kennedy phenomenon** describes the pattern of injury observed when a **bullet passes through a body part**, leaving an **exit wound larger than the entrance wound**. - This occurs because the bullet creates a **temporary cavity** that collapses, and the tissue at the exit point is stretched beyond its elastic limit, resulting in a larger defect. *Burns* - Burns are injuries caused by heat, chemicals, electricity, or radiation, resulting in **tissue destruction** and often characterized by **blistering, charring, and loss of skin integrity**. - While burns can cause tissue damage, the mechanism of injury and the resulting wound characteristics are distinctly different from the **ballistic trauma** described by the Kennedy phenomenon. *Contusion* - A **contusion**, or bruise, is a type of injury caused by **blunt force trauma** that damages small blood vessels under the skin, leading to discoloration without breaking the skin surface. - This injury mechanism involves **crushing of tissues** and local hemorrhage, which is fundamentally different from the passage of a projectile through tissues. *Road traffic accident* - A road traffic accident can result in a wide range of injuries, including **blunt force trauma**, **lacerations**, **fractures**, and **internal organ damage**. - While significant tissue damage can occur, the specific pattern of an **entry and a larger exit wound** resulting from a penetrating projectile is not a defining characteristic of RTA injuries.

Q: In a case of hanging, ligature mark is an example of:

Pressure abrasion. ***Pressure abrasion*** - A ligature mark in hanging is a classic example of a **pressure abrasion**, caused by the skin being rubbed or pressed against the ligature material. - This friction or pressure removes the superficial layers of the epidermis, creating a mark that reflects the shape and texture of the ligature. *Laceration* - A **laceration** is a tear in the skin caused by a forceful blunt impact, often characterized by irregular, jagged edges. - Ligature marks are typically superficial and linear, not deep tears into the tissue. *Burn* - A **burn** is tissue damage caused by heat, electricity, chemicals, or radiation, leading to erythema, blistering, or charring. - While extreme friction could theoretically generate some heat, the primary mechanism of a ligature mark is mechanical pressure and friction, not thermal energy. *Contusion* - A **contusion**, or bruise, results from bleeding into the tissues due to blunt force trauma, without breaking the skin. - While there may be some underlying bruising associated with a ligature mark, the visible mark itself on the skin surface is an abrasion.

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: Prognosis of schizophrenia is best, if:

Acute onset. ***Acute onset*** - An **acute onset** of schizophrenia is associated with a better prognosis, as it often indicates a more favorable response to treatment and less pervasive deterioration of daily functioning. - This typically suggests that the individual had a relatively intact baseline level of functioning before the emergence of psychotic symptoms. *Negative symptoms* - The presence of prominent **negative symptoms** (e.g., avolition, anhedonia, alogia) is usually associated with a poorer prognosis in schizophrenia. - Negative symptoms are generally harder to treat and often lead to greater functional impairment and disability. *Insidious onset* - An **insidious onset** of schizophrenia, where symptoms develop gradually over time, is typically linked to a poorer prognosis. - This often implies more severe and persistent neurodevelopmental abnormalities and a less robust response to interventions. *Family history is positive* - A **positive family history** of schizophrenia indicates a higher genetic predisposition but does not directly predict the individual's prognosis. - While genetics play a role in susceptibility, the course and outcome of the illness are influenced by many other factors, including symptom presentation and treatment adherence.

Q: An IQ of 40 corresponds to which level of intellectual disability?

Moderate. ***Moderate*** - An **IQ score between 35 and 49** is classified as moderate intellectual disability. - Individuals with moderate intellectual disability often require **supervision** but can develop some communication and self-care skills. *Mild* - **IQ scores between 50 and 69** are indicative of mild intellectual disability. - Individuals with mild intellectual disability can often achieve academic skills up to a **sixth-grade level** and live independently with support. *Profound* - **IQ scores below 20** signify profound intellectual disability. - Individuals with profound intellectual disability require **intensive support** for all activities of daily living and have minimal communication skills. *Severe* - **IQ scores between 20 and 34** fall into the severe intellectual disability category. - Individuals with severe intellectual disability have significant **impairments in adaptive functioning** and require substantial support for self-care and communication.

Question 1

Kennedy phenomenon is seen in:

Accepted Answer

Gunshot injury

Answer

Burns

Answer

Contusion

Answer

Road traffic accident

Question 2

In a case of hanging, ligature mark is an example of:

Accepted Answer

Pressure abrasion

Answer

Laceration

Answer

Burn

Answer

Contusion

Question 3

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 4

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

Accepted Answer

Carburetor

Answer

Muzzle

Answer

Bolt

Answer

Extractor

Question 5

Paltauf's hemorrhages are seen in:

Accepted Answer

Lungs

Answer

Heart

Answer

Liver

Answer

Brain

Question 6

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

Accepted Answer

Krait

Answer

Sea snake

Answer

Cobra

Answer

Viper

Question 7

Prognosis of schizophrenia is best, if:

Accepted Answer

Acute onset

Answer

Negative symptoms

Answer

Insidious onset

Answer

Family history is positive

Question 8

An IQ of 40 corresponds to which level of intellectual disability?

Accepted Answer

Moderate

Answer

Mild

Answer

Profound

Answer

Severe

Question 9

Anxiety is best described as:

Accepted Answer

Excessive worry and emotional distress without loss of reality (Anxiety disorder)

Answer

A specific fear leading to avoidance behavior (Phobic disorder)

Answer

A mental disorder with delusions or hallucinations (Psychosis)

Answer

Enduring maladaptive personality traits (Personality disorder)

Question 10

Frotteurism is:

Accepted Answer

Sexual gratification by rubbing against a non-consenting person

Answer

Sexual practice involving three people

Answer

Sexual pleasure in watching people getting undressed

Answer

Sexual pleasure obtained by witnessing urination

NEET-PG 2013

Dental

Forensic Medicine

Psychiatry