Dental
1 questionsKennedy phenomenon is seen in:
NEET-PG 2013 - Dental NEET-PG Practice Questions and MCQs
Question 1431: Kennedy phenomenon is seen in:
- A. Burns
- B. Gunshot injury (Correct Answer)
- C. Contusion
- D. Road traffic accident
Explanation: ***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.
Forensic Medicine
5 questionsIn a case of hanging, ligature mark is an example of:
Postmortem caloricity may be seen in all the following causes of death, except:
Which of the following is NOT a part of a firearm?
Paltauf's hemorrhages are seen in:
Which of the following snakes is MOST known for venom containing neurotoxins?
NEET-PG 2013 - Forensic Medicine NEET-PG Practice Questions and MCQs
Question 1431: In a case of hanging, ligature mark is an example of:
- A. Laceration
- B. Burn
- C. Pressure abrasion (Correct Answer)
- D. Contusion
Explanation: ***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.
Question 1432: Postmortem caloricity may be seen in all the following causes of death, except:
- A. Barbiturates poisoning (Correct Answer)
- B. Septicemia
- C. Strychnine poisoning
- D. Tetanus
Explanation: ***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.
Question 1433: Which of the following is NOT a part of a firearm?
- A. Muzzle
- B. Bolt
- C. Extractor
- D. Carburetor (Correct Answer)
Explanation: ***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.
Question 1434: Paltauf's hemorrhages are seen in:
- A. Heart
- B. Liver
- C. Lungs (Correct Answer)
- D. Brain
Explanation: ***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.
Question 1435: Which of the following snakes is MOST known for venom containing neurotoxins?
- A. Sea snake
- B. Cobra
- C. Krait (Correct Answer)
- D. Viper
Explanation: ***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).
Psychiatry
4 questionsPrognosis of schizophrenia is best, if:
An IQ of 40 corresponds to which level of intellectual disability?
Anxiety is best described as:
Frotteurism is:
NEET-PG 2013 - Psychiatry NEET-PG Practice Questions and MCQs
Question 1431: Prognosis of schizophrenia is best, if:
- A. Acute onset (Correct Answer)
- B. Negative symptoms
- C. Insidious onset
- D. Family history is positive
Explanation: ***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.
Question 1432: An IQ of 40 corresponds to which level of intellectual disability?
- A. Mild
- B. Profound
- C. Severe
- D. Moderate (Correct Answer)
Explanation: ***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 1433: Anxiety is best described as:
- A. A specific fear leading to avoidance behavior (Phobic disorder)
- B. A mental disorder with delusions or hallucinations (Psychosis)
- C. Enduring maladaptive personality traits (Personality disorder)
- D. Excessive worry and emotional distress without loss of reality (Anxiety disorder) (Correct Answer)
Explanation: ***Excessive worry and emotional distress without loss of reality (Anxiety disorder)*** - **Anxiety** is characterized by persistent, excessive worry and apprehension, often accompanied by emotional distress and physical symptoms, while the individual maintains contact with reality. - This definition distinguishes it from psychotic disorders where there is a **loss of reality**. *A specific fear leading to avoidance behavior (Phobic disorder)* - While phobic disorders are a type of **anxiety disorder**, they represent a specific subtype characterized by an intense, irrational fear of a particular object or situation. - The given description of anxiety is broader than just a **phobic disorder**. *A mental disorder with delusions or hallucinations (Psychosis)* - This describes **psychotic disorders**, where individuals experience a significant disruption in their perception of reality, marked by **delusions** (fixed false beliefs) and/or **hallucinations** (sensory experiences without external stimuli). - Anxiety, in its core definition, does not involve a **loss of reality**. *Enduring maladaptive personality traits (Personality disorder)* - **Personality disorders** are characterized by deeply ingrained, inflexible, and maladaptive patterns of perceiving, relating to, and thinking about the environment and oneself. - These patterns typically manifest across various situations and are stable over time, differing significantly from the definition of anxiety as a state of **worry and emotional distress**.
Question 1434: Frotteurism is:
- A. Sexual practice involving three people
- B. Sexual pleasure in watching people getting undressed
- C. Sexual gratification by rubbing against a non-consenting person (Correct Answer)
- D. Sexual pleasure obtained by witnessing urination
Explanation: ***Sexual gratification by rubbing against a non-consenting person*** - **Frotteurism** is a paraphilia characterized by recurrent, intense sexual urges or behaviors involving touching and rubbing against a non-consenting person, typically in crowded public places. - The individual usually achieves **sexual arousal** and gratification from this physical contact. *Sexual practice involving three people* - This describes a **threesome** or **ménage à trois**, which is a sexual activity involving three individuals, but it does not specifically define frotteurism. - Frotteurism is defined by the non-consensual nature of rubbing against another, not the number of participants. *Sexual pleasure in watching people getting undressed* - This describes **voyeurism**, which is obtaining sexual arousal from observing unsuspecting individuals who are naked, disrobing, or engaging in sexual activity. - Frotteurism involves physical contact, whereas voyeurism is primarily observational. *Sexual pleasure obtained by witnessing urination* - This is a specific type of **urophilia**, a paraphilia involving sexual arousal from urine or urination. - This is distinct from frotteurism, which involves non-consensual physical contact with another person.