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Questions and Answers
Which statement about anterior nerve roots is accurate?
Which statement about anterior nerve roots is accurate?
Which muscle is NOT supplied by the posterior rami of spinal nerves?
Which muscle is NOT supplied by the posterior rami of spinal nerves?
The lateral half of the ankle is primarily supplied by which dermatome?
The lateral half of the ankle is primarily supplied by which dermatome?
Which myotome is responsible for plantar flexion of the ankle?
Which myotome is responsible for plantar flexion of the ankle?
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Which reflex test is most associated with the S1 segment?
Which reflex test is most associated with the S1 segment?
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Where does the superior cerebral vein lie?
Where does the superior cerebral vein lie?
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Which of the following statements about the circle of Willis is correct?
Which of the following statements about the circle of Willis is correct?
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Which artery gives off the ophthalmic artery?
Which artery gives off the ophthalmic artery?
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What does the internal carotid artery primarily supply?
What does the internal carotid artery primarily supply?
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Which statement is true regarding the anterior cerebral artery?
Which statement is true regarding the anterior cerebral artery?
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Which part of the brain has a blood-brain barrier?
Which part of the brain has a blood-brain barrier?
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Which is the largest branch of the internal carotid artery?
Which is the largest branch of the internal carotid artery?
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Where do the cell bodies for the motor supply of the trigeminal nerve lie?
Where do the cell bodies for the motor supply of the trigeminal nerve lie?
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Which structure contains the cell bodies for the motor supply of the facial nerve?
Which structure contains the cell bodies for the motor supply of the facial nerve?
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The brain stem does NOT include which of the following structures?
The brain stem does NOT include which of the following structures?
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Which cranial nerve lies at the junction between the pons and medulla?
Which cranial nerve lies at the junction between the pons and medulla?
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What is true about the lumbar plexus?
What is true about the lumbar plexus?
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Which is the smallest cranial nerve?
Which is the smallest cranial nerve?
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Which statement about bladder innervation is correct?
Which statement about bladder innervation is correct?
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Which of the following statements about spinal cord blood supply is accurate?
Which of the following statements about spinal cord blood supply is accurate?
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Which midbrain cells are involved in general light reflexes?
Which midbrain cells are involved in general light reflexes?
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The medulla oblongata passes through which anatomical feature?
The medulla oblongata passes through which anatomical feature?
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What is the typical diameter range of a motor nerve fiber?
What is the typical diameter range of a motor nerve fiber?
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Which structure does NOT receive supply from the occulomotor nerve?
Which structure does NOT receive supply from the occulomotor nerve?
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Which dermatome supplies the index finger?
Which dermatome supplies the index finger?
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Where are the motor nuclei of the facial nerve located?
Where are the motor nuclei of the facial nerve located?
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Which statement about the sensory root of the facial nerve is true?
Which statement about the sensory root of the facial nerve is true?
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Which of the following is not a branch of the trigeminal nerve?
Which of the following is not a branch of the trigeminal nerve?
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Which cranial nerve is responsible for the function of the superior oblique muscle?
Which cranial nerve is responsible for the function of the superior oblique muscle?
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What is true regarding the trigeminal nerve?
What is true regarding the trigeminal nerve?
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Which of the following best describes a dermatome?
Which of the following best describes a dermatome?
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Which myotome is responsible for shoulder abduction?
Which myotome is responsible for shoulder abduction?
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Which of the following is not a branch of the ophthalmic division of the trigeminal nerve?
Which of the following is not a branch of the ophthalmic division of the trigeminal nerve?
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Which pathway is not concerned with posture and movement?
Which pathway is not concerned with posture and movement?
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Which of the following is transmitted by the posterior column?
Which of the following is transmitted by the posterior column?
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Which nerve is responsible for supplying sensation to the vertex of the scalp?
Which nerve is responsible for supplying sensation to the vertex of the scalp?
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Which ganglion does corneal sensation synapse in?
Which ganglion does corneal sensation synapse in?
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What describes the effect of damage to Broca's area?
What describes the effect of damage to Broca's area?
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What is the role of the anterior cerebral artery?
What is the role of the anterior cerebral artery?
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Which nerve supplies the skin of the lower eyelid?
Which nerve supplies the skin of the lower eyelid?
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Which option correctly describes the function of Wernicke's area?
Which option correctly describes the function of Wernicke's area?
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What is the primary function of the third occipital nerve?
What is the primary function of the third occipital nerve?
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Study Notes
Central Nervous System MCQs - Section 1
- Blood-brain barrier: The median eminence of the hypothalamus has a blood-brain barrier.
- Largest branch of internal carotid artery: The middle cerebral artery is the largest branch of the internal carotid artery.
- Brain stem exclusions: The diencephalon is not part of the brain stem.
- Pontine/Medullary junction: The abducent nerve (cranial nerve VI) lies in the junction between the pons and medulla.
- Smallest cranial nerve: The trochlear nerve (cranial nerve IV) is the smallest cranial nerve.
- Midbrain reflexes: The superior colliculus in the midbrain is involved in general light reflexes.
Central Nervous System MCQs - Section 2
- Medulla oblongata functions: The medulla oblongata passes through the foramen magnum, and receives blood supply from the internal carotid artery.
- Oculomotor nerve exclusions: The lateral rectus muscle is not supplied by the oculomotor nerve.
- Central cord syndrome: Central cord syndrome includes loss of movement and sensation below the injured segment, and paralysis with loss of touch sensation on one side, and loss of pain and temperature, with spasticity in the limbs.
- Circle of Willis encirclement: The circle of Willis encircles the pituitary stalk.
Central Nervous System MCQs - Section 3
- Trigeminal nerve cell bodies: Cell bodies for the motor supply of the trigeminal nerve are located in the pons area.
- Facial nerve cell bodies: Cell bodies for the motor supply of the facial nerve in the pons.
- Lumbar plexus: The lumbar plexus is found medial to the inferior vena cava. The femoral nerve is part of the lumbar plexus.
- Bladder innervation: Parasympathetic bladder innervation is via the pelvic splanchnic nerves.
- Spinal cord blood supply: The anterior spinal artery arises from the vertebral artery. Only one posterior spinal artery is found.
- Motor nerve fibre diameters: The diameter of a motor nerve fibre ranges from 1-50 μm.
Central Nervous System MCQs - Section 4
- Myotomal nerve supply: Opponens pollicis is supplied by C8.
- Sneeze reflex afferent path: The ophthalmic nerve carries the sensory information for the sneeze reflex.
- Facial nerve nuclei: The facial nerve nuclei are located in the medulla oblongata.
- Dermatome for great toe: The dermatome supplying the great toe is usually S1.
- Regarding Cranial Nerve VII (Facial): The facial nerve supplies muscles for facial expression.
- Thoracic and abdominal cutaneous innervation: Skin above the second rib is supplied by the cervical plexus (C4), the anterior primary rami of thoracic spinal nerves (T1-L1) supply the skin of the thorax and abdomen.
Central Nervous System MCQs - Section 5
- Whiplash injury symptoms: A prolapsed 5th cervical disc impinging on C6 root is a potential cause.
- Wernicke's encephalopathy involvement: Receptive dysphasia is involved.
- Pancreatitis referred pain: Referred pain from pancreatitis is often felt at the T7/8 level.
- Corneal sensation ganglion: Corneal sensations synapse in the trigeminal ganglion.
- Parasympathetic nervous system characteristics: Parasympathetic system fibers originate in brainstem and sacral regions.
- Spinal cord hemi-section (Brown-Sequard syndrome): The syndrome results in motor paralysis on the same side as the lesion and loss of pain, touch, and temperature sensation in the opposite side. The spinal cord blood supply, at each level, is in danger due to poor anastamoses.
Central Nervous System MCQs - Section 6
- Vagus nerve characteristics: The vagus nerve has both motor and sensory fibers. It arises from the medulla, also receiving some fibers from the accessory nerve.
- Facial nerve sensory root: The sensory root of the facial nerve is the nervus intermedius and emerges from the base of the skull via the internal acoustic meatus.
- Trigeminal nerve branches: The great auricular nerve is not a branch of the trigeminal nerve.
- Cranial nerve IV (Trochlear): The trochlear nerve supplies the superior oblique muscle.
- Trigeminal nerve divisions: The mandibular division of the trigeminal nerve is primarily motor.
- Cervical sympathetic trunk path: The cervical sympathetic trunk descends from the upper portion of the posterior triangle to the first rib. It lies behind the carotid sheath.
Central Nervous System MCQs - Section 7
- Myotome for hip abduction: The S1 myotome supplies hip abduction.
- Myotome for shoulder abduction: C5-6 myotome provides shoulder abduction.
- Branches of ophthalmic division (trigeminal): The infraorbital, supraorbital, and supratrochlear nerves are part of the ophthalmic division.
- Maxillary nerve branch: The zygomaticofacial nerve is a branch of the maxillary nerve.
- Midbrain structures: The midbrain is located between the pons and upper spinal cord, it contains oculomotor nuclei and trigeminal nuclei.
- Cerebrospinal fluid flow path: Cerebrospinal fluid communicates with the subarachnoid space via the 4th ventricle.
Central Nervous System MCQs - Section 8
- Pathways not involved in posture/movement: The Tractus solitarius is not involved in posture or movement.
- Posterior column transmission: The posterior column transmits afferent tendon stretch impulses.
- Nerve supplying the nose bridge: The infraorbital nerve supplies the bridge of the nose.
- Nerve for vertex scalp: The greater occipital nerve supplies the vertex.
- Speech center location: Broca's area is typically in the left hemisphere of the brain. Damage to Wernicke's area results in receptive aphasia.
- Optic pathway (ocular movements): Combined action of superior rectus and inferior oblique muscles causes upward gaze.
Central Nervous System MCQs - Section 9
- Cerebral cortex blood supply: The middle cerebral artery supplies contralateral arm, leg, and speech areas.
- Nasal cavity septum innervation: The nasopalatine nerve from cranial nerve V2 innervates the septum.
- Fifth cranial nerve (trigeminal) distributions: The trigeminal nerve provides sensory supply to the skin of the tip of the nose (via the external nasal branch), earlobe (via the auriculotemporal nerve), and skin over the occiput.
- Ear cutaneous innervation: The lesser auricular nerve innervates the ear.
- Ophthalmic division of trigeminal: The ophthalmic division of the trigeminal nerve enters through the inferior orbital fissure. It supplies sensation to the forehead and upper eyelid.
- Location of superior cerebral vein: The superior cerebral vein lies between the dura and skull.
Central Nervous System MCQs - Section 10 & 11
- Anterior nerve roots components: Anterior nerve roots consist of efferent motor fibers and fibers of the sympathetic nervous system.
- Posterior rami muscle supply: Levator costae muscles are supplied by posterior rami.
- Dermatome for lateral ankle half: The lateral half of the ankle is supplied by the S1 dermatome.
Central Nervous System MCQs - Section 12
- Ankle jerk testing: The ankle jerk tests the L5 and S1 segments.
- Anal reflex segment: The anal reflex mainly depends on the S3-S5 segments.
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Test your knowledge on the Central Nervous System with these multiple-choice questions covering key concepts such as the blood-brain barrier, cranial nerves, and brain stem functions. This quiz is designed to challenge your understanding of anatomy and physiology, making it perfect for students or professionals in the field.
