#1
Which structure of the brain is most commonly injured in traumatic brain injury (TBI)?
Frontal lobe
ExplanationFrontal lobe injuries are common due to their location in the front of the brain, often affected in head trauma.
#2
Which imaging modality is often used to assess TBI-related structural damage?
Computed Tomography (CT)
ExplanationCT scans are preferred for quick assessment of structural damage in TBI cases.
#3
Which part of the brain is responsible for regulating vital functions such as breathing and heart rate?
Brainstem
ExplanationThe brainstem controls essential autonomic functions like breathing and heart rate.
#4
Which of the following is NOT a common symptom of mild TBI (concussion)?
Loss of consciousness
ExplanationMild TBIs typically don't involve loss of consciousness, distinguishing them from more severe injuries.
#5
Which protective equipment is commonly used to prevent head injuries in contact sports?
Mouthguard
ExplanationMouthguards absorb shock and protect teeth, jaw, and mitigate head injuries in contact sports.
#6
Which part of the brain is responsible for the regulation of emotions and social behavior?
Frontal lobe
ExplanationThe frontal lobe plays a significant role in regulating emotions, decision-making, and social behavior.
#7
Which of the following is NOT a primary mechanism of injury in TBI?
Compression
ExplanationCompression typically doesn't cause TBI; it's more commonly associated with spinal injuries.
#8
What is the primary cellular process contributing to secondary brain injury after TBI?
Apoptosis
ExplanationApoptosis, or programmed cell death, is a key process leading to secondary brain injury post-TBI.
#9
Which neurotransmitter is commonly associated with excitotoxicity following TBI?
Glutamate
ExplanationGlutamate, when excessively released, can lead to excitotoxicity and neuronal damage in TBI.
#10
Which of the following is a potential complication of severe TBI?
Hyponatremia
ExplanationHyponatremia, an electrolyte imbalance, can occur due to hormonal disturbances after severe TBI.
#11
Which type of TBI injury involves a focal brain lesion caused by the brain hitting the skull opposite the site of impact?
Contusion
ExplanationContusions result from the brain hitting the skull, causing localized bruising and injury.
#12
Which of the following statements about coup-contrecoup injury in TBI is true?
It involves injury at both the site of impact and the opposite side of the brain.
ExplanationCoup-contrecoup injuries occur when forces cause the brain to impact the skull on both sides, leading to injury.
#13
Which scoring system is commonly used to assess the severity of TBI based on clinical presentation?
Glasgow Coma Scale (GCS)
ExplanationGCS is a reliable tool for assessing TBI severity based on eye, verbal, and motor responses.
#14
What is the primary cause of diffuse axonal injury (DAI) in TBI?
Acceleration-deceleration forces
ExplanationDAI results from rapid acceleration-deceleration, causing widespread shearing of axons.
#15
Which medication is commonly administered to reduce intracranial pressure (ICP) in severe TBI?
Mannitol
ExplanationMannitol, an osmotic diuretic, is often used to decrease intracranial pressure in severe TBI cases.
#16
Which cognitive function is most commonly affected in patients with moderate to severe TBI?
Executive function
ExplanationExecutive functions such as planning, decision-making, and problem-solving are frequently impaired in moderate to severe TBI.
#17
Which hormone, released in response to stress, can exacerbate secondary brain injury following TBI?
Cortisol
ExplanationElevated cortisol levels, triggered by stress, can worsen secondary brain injury after TBI.
#18
Which cognitive impairment is characterized by difficulty understanding and producing speech after TBI?
Aphasia
ExplanationAphasia involves language difficulties, including speaking, understanding, reading, and writing, post-TBI.