Injuries and Their Significance Practice Questions

Q: The following patient has which type of injury on the face? (Recent NEET Pattern 2016-17)

Laceration. ***Laceration*** - The image shows an **irregular, deep wound with torn, jagged edges**, consistent with a laceration caused by a blunt force trauma. - Unlike clean incisions, lacerations often have **tissue bridges** and devitalized tissue within the wound. *Abrasion* - An abrasion is a **superficial injury** where the **epidermis is scraped off**, often leaving a raw, weeping surface, which is not what is seen here. - It typically results from friction against a rough surface and does not involve deep tissue tearing. *Incised wound* - An incised wound is caused by a **sharp object**, resulting in **clean, sharp margins** and little tissue damage along the edges. - The wound in the image has irregular, torn edges, which is not characteristic of an incised wound. *Chop wound* - A chop wound results from a heavy, sharp-edged object, combining features of an incised wound and a laceration, often causing **bone damage**. - While deep, the wound in the image lacks the characteristic deep tissue and potential bone involvement typically associated with a chop wound.

Q: All are true about the condition shown below except:

Can be ante-mortem. ***Can be ante-mortem*** - This is the **INCORRECT** statement. The condition shown (pugilistic attitude) is a **purely post-mortem artifact** that occurs due to heat-induced coagulation of muscle proteins after death. - While thermal burns can occur ante-mortem, the **pugilistic attitude itself is always a post-mortem change** and cannot occur in living individuals as it requires complete muscle protein coagulation. *Coagulation of muscle proteins* - **TRUE statement.** Heat causes **denaturation and coagulation** of muscle proteins, particularly **myosin and actin**. - This protein coagulation leads to **muscle shortening and contraction**, resulting in the characteristic flexed posture known as pugilistic attitude. *Heat rupture seen* - **TRUE statement.** Heat rupture refers to **longitudinal splitting** of skin and deeper tissues due to intense heat exposure. - Occurs due to **internal steam pressure** and expansion of gases when body fluids vaporize under high temperatures. *Skin slippage* - **TRUE statement.** Also called **heat vesication**, this involves separation of the **epidermis from dermis** due to thermal damage. - Results in **peeling of outer skin layers** in sheets, distinct from putrefactive skin slippage seen in decomposition.

Q: The following phenomenon is noticed in lightning strike victims and typically fades away after how much time?

24 hours. ***24 hours*** - The image displays **Lichtenberg figures**, which are fern-like or tree-like patterns of skin reddening, typically observed in individuals struck by **lightning**. - These transient patterns usually appear within **minutes to a few hours** post-lightning strike and fade away within **24 hours**, resolving without permanent sequelae. *18 hours* - While Lichtenberg figures can develop within hours, 18 hours is not the typical **maximum duration** for their visibility. They tend to disappear faster. - This timeframe doesn't represent the established window for these characteristic skin markings. *36 hours* - Lichtenberg figures are **transient** skin markings that typically fade much sooner than 36 hours. - If skin discoloration persists beyond 24 hours, it might indicate **burns** or other underlying injuries, rather than solely Lichtenberg figures. *72 hours* - A duration of 72 hours is far too long for the characteristic presentation of Lichtenberg figures, which are known for their **rapid disappearance**. - Any marks visible at 72 hours would likely be due to other forms of **trauma** or injury from the lightning strike, such as burns or tissue damage.

Q: The following appearance of skin is seen in case of:

High voltage electric burns. ***High voltage electric burns*** - The image shows **"crocodile skin"** or **"lichtenberg figures"**, which are characteristic patterns of skin damage due to the rapid discharge of **high-voltage electricity** through capillaries. - These are pathognomonic for **high-voltage electrical injuries** and result from arborescent patterns of superficial hemorrhage or skin charring. *Drowning* - Drowning typically leads to findings such as **foam in the airways**, **pulmonary edema**, and if prolonged immersion, **washerwoman's skin** (wrinkling) on hands and feet. - The skin appearance in the image does not correlate with the typical post-mortem findings of drowning. *Neck ligature* - Neck ligature injuries result from compression of the neck, leading to a **ligature mark** or furrow on the neck, often associated with petechiae above the constriction. - The pattern seen in the image is not a ligature mark and is inconsistent with neck compression. *High temperature water burns* - High-temperature water burns (scalds) usually produce **blistering**, erythema, or deeper tissue necrosis depending on temperature and exposure time. - While burns can cause skin changes, the specific **arborescent pattern** displayed in the image is not typical of hot water scalds.

Q: Identify the fracture given in the image given below:

Gutter. ***Gutter*** - A **gutter fracture** involves a linear fracture with depression of the adjacent bone fragment, often forming a "gutter" or trough-like deformity, as indicated by the arrow in the image. - This type of fracture is typically caused by a **blunt impact** to the skull that causes focal indentation. *Pond* - A **pond fracture** is a type of depressed skull fracture seen in infants, characterized by a smooth, bowl-like depression without sharp edges or fragmentation, resembling an indentation from a thumb. - It results from **low velocity impact** and the skull's plasticity in infants, which is not what is seen here. *Hinge* - A **hinge fracture** is a type of basilar skull fracture that involves the skull base, often extending bilaterally through structures like the sphenoid bone, creating a "hinge" effect. - This fracture pattern usually results from **severe trauma** and is not depicted in this image, which shows a localized depression. *Comminuted* - A **comminuted fracture** is characterized by the bone breaking into three or more fragments at the site of injury. - While there is bone fragmentation in the image, the primary descriptive feature highlighted by the arrow is the **depressed trough** rather than multiple distinct pieces.

Q: The following image shows: (AIIMS Nov 2018)

Abrasion. ***Abrasion*** - An **abrasion** is a type of wound caused by the skin rubbing or scraping against a rough surface, resulting in the **removal of the superficial layers of the epidermis**. - The image shows a reddened, raw, and sometimes bleeding area where the top layer of skin has been scraped off, which is characteristic of an abrasion. *Imprint* - An **imprint injury** typically refers to a mark left on the skin by an object that has pressed or struck it, leaving a discernible pattern or shape. - The image does not show a distinct pattern or shape indicative of an object pressing against the skin, but rather a diffuse superficial skin loss. *Laceration* - A **laceration** is a deep cut or tear in the skin or flesh, often with irregular edges, caused by a forceful impact or trauma. - The injury in the image is superficial and does not appear to be a deep cut or tear through the skin layers. *Contusion* - A **contusion**, or bruise, is caused by trauma to blood vessels under the skin, resulting in blood leaking into surrounding tissues. - While there might be some underlying bruising, the primary visible injury is the **surface skin loss and raw appearance**, which is not characteristic of a simple contusion.

Q: Based on the image provided, identify the range of fire.

Close range. ***Close range*** - The image clearly shows **tattooing** (unburnt gunpowder particles embedded in the skin) and **scorching/singeing** around the wound entrance, which are pathognomonic features of close-range gunshot wounds. - Close-range wounds occur when the firearm is discharged from **6 inches to 2 feet** away, allowing hot gases and powder particles to reach the skin but without creating a muzzle imprint. *Distant range* - Distant range wounds (beyond 2-3 feet) show **no tattooing or scorching** as the gunpowder particles lose velocity and hot gases cool down before reaching the target. - The wound would appear as a simple **punched-out hole** without surrounding debris, which is clearly not the case in this image. *Contact* - Contact wounds are characterized by a **muzzle imprint**, **star-shaped laceration** from gas expansion, and **absence of surface tattooing** as all residue enters the wound tract. - The image lacks the typical **cruciate tears** and **cherry-red discoloration** from carbon monoxide that are seen in contact wounds. *Cannot be predicted* - The visible **tattooing pattern** and **scorching** provide clear forensic evidence that allows definitive range determination according to **Reddy's Forensic Medicine** principles. - The combination of these specific findings makes range assessment not only possible but straightforward, contradicting the notion that it cannot be predicted.

Q: Identify the pattern of abrasion shown in the image below.

Ligature mark. ***Ligature mark*** - The image clearly displays a **linear impression** on the neck, consistent with a **ligature mark**, which is an abrasion caused by a constricting object. - This type of abrasion is often seen in cases of **strangulation or hanging**, where a cord or similar item tightens around the neck. *Pressure abrasion* - Pressure abrasions are typically caused by **blunt forceful contact** with a surface, resulting in a scraped or grazed appearance, which differs from the distinct linear mark shown. - They are usually broad and irregular, not forming a clear, thin line as seen in the image. *Graze abrasion* - Graze abrasions, also known as scrapes, involve the **superficial removal of the epidermis** due to friction against a rough surface. - They tend to be spread out and irregular, lacking the deep, circumscribed linear pattern characteristic of a ligature mark. *Imprint abrasion* - Imprint abrasions reflect the **exact pattern of the impacting object** (e.g., tire track, weapon pattern), which is not evident in the image. - While a ligature itself can leave an imprint, the term "imprint abrasion" is usually reserved for more complex patterns than a simple linear groove.

Q: Post-mortem examination of a patient reveals the following. What is this finding known as?

Hesitation cuts. ***Hesitation cuts*** - The image displays multiple, parallel or semi-parallel **superficial incised wounds**, often with varying depths, which are characteristic of **hesitation cuts** (also called hesitation marks or tentative cuts). - These cuts are frequently observed in cases of **suicide attempts** where the individual makes several tentative or trial cuts before making a more serious or fatal wound. - Typically found on **wrists, neck, or antecubital fossa** and run parallel to each other with progressively increasing depth. - The pattern of multiple superficial parallel cuts is **pathognomonic** of hesitation marks. *Grazed abrasion* - A **grazed abrasion** is a superficial injury where the epidermis is scraped off, typically caused by friction against a rough surface, resulting in a broad, irregular area of skin loss. - The injuries in the image are clearly distinct **incised wounds** (clean cuts), not broad areas of scraped or abraded skin. *Defense wounds* - **Defense wounds** are injuries sustained while attempting to ward off an attack, typically found on the **palmar surface of hands and forearms**. - These are usually deeper, irregular cuts from grabbing or blocking a weapon during homicidal assault. - The pattern in the image shows **organized, parallel, superficial cuts** in one location, inconsistent with defensive injuries sustained during a struggle. *Chop wounds* - **Chop wounds** are deep incised wounds caused by heavy cutting instruments like axes, cleavers, or machetes, often with underlying **bone injury**. - These are characterized by **deep tissue damage** with a wedge-shaped wound profile. - The wounds shown are **superficial and parallel**, not deep chopping injuries.

Q: Match the following weapons with their corresponding injury types: Weapons: A. Axe B. RTA (Road Traffic Accident) C. Blade D. Lathi Injury Types: 5. Incised wound 6. Tram track bruise 7. Grazed abrasion 8. Chop wound

A-8, B-7, C-5, D-6. ***A-8 (Axe - Chop wound), B-7 (RTA - Grazed abrasion), C-5 (Blade - Incised wound), D-6 (Lathi - Tram track bruise)*** - An **axe** is a heavy cutting tool that typically causes a **chop wound**, characterized by a combination of cutting and crushing. - A **Road Traffic Accident (RTA)** frequently results in **grazed abrasions** due to friction and shearing forces as the body slides against rough surfaces. - A **blade** (like a knife or razor) is designed to cut, producing an **incised wound** with clean, sharp edges. - A **lathi** (a heavy stick or baton) delivers blunt force trauma, often causing a **tram track bruise** due to the skin being crushed between the impactor and underlying bone, leading to parallel lines of bruising. *A-5, B-6, C-8, D-7* - This option incorrectly associates an **axe** with an **incised wound** (which is caused by a blade) and a **blade** with a **chop wound** (caused by an axe). - It also misattributes **RTA** to a **tram track bruise** and a **lathi** to a **grazed abrasion**, which are not the most typical injury patterns for these respective weapons/mechanisms. *A-6, B-8, C-7, D-5* - This pairing mistakenly links an **axe** with a **tram track bruise** and a **blade** with a **grazed abrasion**. - It also incorrectly associates an **RTA** with a **chop wound** and a **lathi** with an **incised wound**. *A-7, B-5, C-6, D-8* - This option incorrectly matches an **axe** with a **grazed abrasion** and a **lathi** with a **chop wound**. - It also inaccurately connects an **RTA** with an **incised wound** and a **blade** with a **tram track bruise**.

Question 1

The following patient has which type of injury on the face? (Recent NEET Pattern 2016-17)

Accepted Answer

Laceration

Answer

Abrasion

Answer

Incised wound

Answer

Chop wound

Question 2

All are true about the condition shown below except:

Accepted Answer

Can be ante-mortem

Answer

Coagulation of muscle proteins

Answer

Heat rupture seen

Answer

Skin slippage

Question 3

The following phenomenon is noticed in lightning strike victims and typically fades away after how much time?

Accepted Answer

24 hours

Answer

18 hours

Answer

36 hours

Answer

72 hours

Question 4

The following appearance of skin is seen in case of:

Accepted Answer

High voltage electric burns

Answer

Drowning

Answer

Neck ligature

Answer

High temperature water burns

Question 5

Identify the fracture given in the image given below:

Accepted Answer

Gutter

Answer

Pond

Answer

Hinge

Answer

Comminuted

Question 6

The following image shows: (AIIMS Nov 2018)

Accepted Answer

Abrasion

Answer

Imprint

Answer

Laceration

Answer

Contusion

Question 7

Based on the image provided, identify the range of fire.

Accepted Answer

Close range

Answer

Distant range

Answer

Contact

Answer

Cannot be predicted

Question 8

Identify the pattern of abrasion shown in the image below.

Accepted Answer

Ligature mark

Answer

Pressure abrasion

Answer

Graze abrasion

Answer

Imprint abrasion

Question 9

Post-mortem examination of a patient reveals the following. What is this finding known as?

Accepted Answer

Hesitation cuts

Answer

Grazed abrasion

Answer

Defense wounds

Answer

Chop wounds

Question 10

Match the following weapons with their corresponding injury types:

Weapons:
A. Axe
B. RTA (Road Traffic Accident)
C. Blade
D. Lathi

Injury Types:
5. Incised wound
6. Tram track bruise
7. Grazed abrasion
8. Chop wound

Accepted Answer

A-8, B-7, C-5, D-6

Answer

A-5, B-6, C-8, D-7

Answer

A-6, B-8, C-7, D-5

Answer

A-7, B-5, C-6, D-8

Injuries and Their Significance — MCQs

Injuries and Their Significance — MCQs

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