HSS 3305 MODULE 8 PRACTICE EXAM
QUESTIONS WITH VERIFIED ANSWERS
What are the structures that protect the Central Nervous System (CNS)?
The skull, vertebrae, meninges, cerebrospinal fluid (CSF), and blood-brain barrier.
What is the pathophysiology of increased intracranial pressure (ICP)?
Includes edema, herniation, and hydrocephalus.
What are the common types of skull fractures?
Linear fractures, depressed fractures, diastatic fractures, and basilar skull fractures.
What are clinical signs of a basilar skull fracture?
Periorbital bruising ('raccoon eyes'), bruising behind the ears ('Battle's sign'), CSF leaking from
the nose or ears, hemotympanum, loss of smell, vision changes, hearing loss, and facial nerve
palsy.
What is the significance of the 'halo sign' in skull fractures?
It indicates a CSF leak, showing a double-ring pattern of CSF mixed with blood.
What is the role of the meninges in CNS protection?
The meninges are protective membranes that cover the brain and spinal cord.
What is the function of cerebrospinal fluid (CSF)?
CSF cushions the brain and spinal cord, providing protection and maintaining intracranial
pressure.
What is a depressed skull fracture?
A fracture where bone fragments are displaced inward, compressing brain tissue.
What are the consequences of a basilar skull fracture?
Can lead to CSF leaks, cranial nerve damage, and increased risk of meningitis.
What is the Glasgow Coma Scale?
A scale used to assess a person's level of consciousness after a brain injury.
What is the typical outcome of a carotid artery thrombosis due to a skull fracture?
It can result in hemispheric infarction and intractable intracranial hypertension.
What is the pathophysiology of cerebrovascular diseases (CVD)?
Involves disruptions in blood flow to the brain, leading to ischemia or hemorrhage.
,What is hydrocephalus?
A condition characterized by an accumulation of cerebrospinal fluid within the ventricles of the
brain.
What are the protective functions of the skull?
It protects the brain from physical trauma and injury.
What is the difference between linear and diastatic skull fractures?
Linear fractures are simple cracks, while diastatic fractures occur along suture lines, often seen in
infants.
What is the role of the blood-brain barrier?
It protects the brain from potentially harmful substances in the bloodstream while allowing
necessary nutrients to pass.
What is the significance of a ventriculostomy in treating intracranial hypertension?
It helps to relieve pressure by draining excess cerebrospinal fluid.
What are the main components of the protective coverings of the brain?
The dura mater, arachnoid mater, and pia mater.
What is the impact of cranial nerve involvement in skull fractures?
It can lead to neurological deficits such as loss of smell, vision changes, and facial paralysis.
What is the typical management for a patient with a depressed skull fracture?
Emergency craniectomy may be required to relieve pressure and repair damage.
What are the potential risks associated with a basilar skull fracture?
Increased risk of meningitis, vascular injury, and cranial nerve damage.
How does edema contribute to increased intracranial pressure?
Edema increases the volume of brain tissue, leading to elevated pressure within the cranial
cavity.
What is the relationship between hydrocephalus and intracranial pressure?
Hydrocephalus can lead to increased intracranial pressure due to excess cerebrospinal fluid.
What imaging techniques are used to assess skull fractures?
Computed tomography (CT) scans and cerebral arteriograms.
What is the significance of the carotid canal in skull fractures?
Involvement of the carotid canal can lead to thrombosis of the internal carotid artery.
, What is the outcome of a patient with a Glasgow Coma Scale score of 7?
Indicates severe brain injury and a poor prognosis.
What is the role of the vertebrae in CNS protection?
They protect the spinal cord from injury and support the structure of the spine.
What does a GCS score of 7 indicate?
A GCS of 7 indicates a severe traumatic brain injury.
What is the significance of a GCS score of ≤8?
It is associated with significant brain dysfunction, decreased level of consciousness, and need for
airway protection.
What risks are associated with a GCS score of ≤8?
High risk for intracranial hypertension, herniation, and poor prognosis.
What does a fixed, dilated right pupil suggest?
It suggests compression of the right oculomotor nerve (CN III), commonly due to uncal
herniation or direct compression from a skull fracture or hematoma.
What are the critical signs of elevated intracranial pressure (ICP)?
A fixed, dilated pupil is a red flag for dangerously elevated ICP and impending brainstem
compromise.
Why is a depressed skull fracture concerning?
It can injure underlying brain tissue, create pathways for infection, damage vascular structures,
and cause arterial thrombosis.
What is the rationale for performing an emergency craniectomy?
To relieve intracranial pressure, prevent herniation, and allow swollen brain tissue to expand.
What are the five regions of the vertebral column?
Cervical (C1-C7), Thoracic (T1-T12), Lumbar (L1-L5), Sacrum (5 fused), Coccyx (3-4 fused).
What are the functions of the vertebrae?
Protect the spinal cord, support the body, absorb shock, allow controlled movement, and provide
openings for spinal nerve roots.
What can cause compression of the spinal cord?
Trauma, tumors, epidural abscesses, or hematomas.
What are the clinical features of spinal cord injury?
QUESTIONS WITH VERIFIED ANSWERS
What are the structures that protect the Central Nervous System (CNS)?
The skull, vertebrae, meninges, cerebrospinal fluid (CSF), and blood-brain barrier.
What is the pathophysiology of increased intracranial pressure (ICP)?
Includes edema, herniation, and hydrocephalus.
What are the common types of skull fractures?
Linear fractures, depressed fractures, diastatic fractures, and basilar skull fractures.
What are clinical signs of a basilar skull fracture?
Periorbital bruising ('raccoon eyes'), bruising behind the ears ('Battle's sign'), CSF leaking from
the nose or ears, hemotympanum, loss of smell, vision changes, hearing loss, and facial nerve
palsy.
What is the significance of the 'halo sign' in skull fractures?
It indicates a CSF leak, showing a double-ring pattern of CSF mixed with blood.
What is the role of the meninges in CNS protection?
The meninges are protective membranes that cover the brain and spinal cord.
What is the function of cerebrospinal fluid (CSF)?
CSF cushions the brain and spinal cord, providing protection and maintaining intracranial
pressure.
What is a depressed skull fracture?
A fracture where bone fragments are displaced inward, compressing brain tissue.
What are the consequences of a basilar skull fracture?
Can lead to CSF leaks, cranial nerve damage, and increased risk of meningitis.
What is the Glasgow Coma Scale?
A scale used to assess a person's level of consciousness after a brain injury.
What is the typical outcome of a carotid artery thrombosis due to a skull fracture?
It can result in hemispheric infarction and intractable intracranial hypertension.
What is the pathophysiology of cerebrovascular diseases (CVD)?
Involves disruptions in blood flow to the brain, leading to ischemia or hemorrhage.
,What is hydrocephalus?
A condition characterized by an accumulation of cerebrospinal fluid within the ventricles of the
brain.
What are the protective functions of the skull?
It protects the brain from physical trauma and injury.
What is the difference between linear and diastatic skull fractures?
Linear fractures are simple cracks, while diastatic fractures occur along suture lines, often seen in
infants.
What is the role of the blood-brain barrier?
It protects the brain from potentially harmful substances in the bloodstream while allowing
necessary nutrients to pass.
What is the significance of a ventriculostomy in treating intracranial hypertension?
It helps to relieve pressure by draining excess cerebrospinal fluid.
What are the main components of the protective coverings of the brain?
The dura mater, arachnoid mater, and pia mater.
What is the impact of cranial nerve involvement in skull fractures?
It can lead to neurological deficits such as loss of smell, vision changes, and facial paralysis.
What is the typical management for a patient with a depressed skull fracture?
Emergency craniectomy may be required to relieve pressure and repair damage.
What are the potential risks associated with a basilar skull fracture?
Increased risk of meningitis, vascular injury, and cranial nerve damage.
How does edema contribute to increased intracranial pressure?
Edema increases the volume of brain tissue, leading to elevated pressure within the cranial
cavity.
What is the relationship between hydrocephalus and intracranial pressure?
Hydrocephalus can lead to increased intracranial pressure due to excess cerebrospinal fluid.
What imaging techniques are used to assess skull fractures?
Computed tomography (CT) scans and cerebral arteriograms.
What is the significance of the carotid canal in skull fractures?
Involvement of the carotid canal can lead to thrombosis of the internal carotid artery.
, What is the outcome of a patient with a Glasgow Coma Scale score of 7?
Indicates severe brain injury and a poor prognosis.
What is the role of the vertebrae in CNS protection?
They protect the spinal cord from injury and support the structure of the spine.
What does a GCS score of 7 indicate?
A GCS of 7 indicates a severe traumatic brain injury.
What is the significance of a GCS score of ≤8?
It is associated with significant brain dysfunction, decreased level of consciousness, and need for
airway protection.
What risks are associated with a GCS score of ≤8?
High risk for intracranial hypertension, herniation, and poor prognosis.
What does a fixed, dilated right pupil suggest?
It suggests compression of the right oculomotor nerve (CN III), commonly due to uncal
herniation or direct compression from a skull fracture or hematoma.
What are the critical signs of elevated intracranial pressure (ICP)?
A fixed, dilated pupil is a red flag for dangerously elevated ICP and impending brainstem
compromise.
Why is a depressed skull fracture concerning?
It can injure underlying brain tissue, create pathways for infection, damage vascular structures,
and cause arterial thrombosis.
What is the rationale for performing an emergency craniectomy?
To relieve intracranial pressure, prevent herniation, and allow swollen brain tissue to expand.
What are the five regions of the vertebral column?
Cervical (C1-C7), Thoracic (T1-T12), Lumbar (L1-L5), Sacrum (5 fused), Coccyx (3-4 fused).
What are the functions of the vertebrae?
Protect the spinal cord, support the body, absorb shock, allow controlled movement, and provide
openings for spinal nerve roots.
What can cause compression of the spinal cord?
Trauma, tumors, epidural abscesses, or hematomas.
What are the clinical features of spinal cord injury?
