IONM Midterm Exam Questions
with Correct Answers | Latest
Update 100% Pass
What spinal nerve root innervates the sternocleidomastoid? - CORRECT
ANSWER-C2 (Spinal Accessory Nerve)
What spinal nerve root innervates the Trapezius? - CORRECT ANSWER-C3, C4
(Spinal Accessory nerve)
What spinal nerve root innervates the deltoid and biceps? - CORRECT
ANSWER-C5, C6
What spinal nerve root innervates the triceps? - CORRECT ANSWER-C7, C8
What spinal nerve root innervates the extensor carpi radialis? - CORRECT
ANSWER-C6, C7
What spinal nerve root innervates the flexor carpi ulnaris? - CORRECT
ANSWER-C8
What spinal nerve root innervates the first dorsal interosseous and the abductor
digiti minimi? - CORRECT ANSWER-C8, T1
,What spinal nerve root innervates the intercostals? - CORRECT ANSWER-T1 -
T11
What spinal nerve root innervates the rectus abdominus? - CORRECT ANSWER-
T5- T12
What spinal nerve root innervates the iliopsoas and the sartorius? - CORRECT
ANSWER-L2, L3
What spinal nerve root innervates the adductor longus? - CORRECT ANSWER-
L2, L3, L4
What spinal nerve root innervates the quadriceps (rectus femoris)? - CORRECT
ANSWER-L3, L4
What spinal nerve root innervates the tibialis anteroir? - CORRECT ANSWER-L4,
L5
What spinal nerve root innervates the biceps femoris and the gastrocnemious? -
CORRECT ANSWER-S1, S2
What spinal nerve root innervates the extensor hallucis longus? - CORRECT
ANSWER-L5, S1
What spinal nerve root innervates the abductor hallucis? - CORRECT ANSWER-
S1-S2
What spinal nerve root innervates the external anal sphincter? - CORRECT
ANSWER-S3, S4
COPYRIGHT ALL RIGHTS RESERVED ©️ 2025
,What muscle corresponds to cranial nerve III (oculomotor)? - CORRECT
ANSWER-Inferior rectus
What muscle corresponds to cranial nerve IV (trochlear)? - CORRECT
ANSWER-Superior oblique
What muscle corresponds to cranial nerve V (trigeminal)? - CORRECT
ANSWER-Temporalis, masseter
What muscle corresponds to cranial nerve VI (abducens)? - CORRECT
ANSWER-Lateral rectus
What muscle corresponds to cranial nerve VII (facial)? - CORRECT ANSWER-
Orbicularis Oculi, Orbicularis oris, mentalis
What muscle corresponds to cranial nerve IX (glossopharyngeal)? - CORRECT
ANSWER-Stylopharyngeus (soft palate)
What muscle corresponds to cranial nerve X (vagus)? - CORRECT ANSWER-
Thryoarytenoid
What muscle corresponds to cranial nerve XI (accessory)? - CORRECT
ANSWER-Trapezius
What muscle corresponds to cranial nerve XII (Hypoglossal)? - CORRECT
ANSWER-Tongue
, Corticospinal tract - CORRECT ANSWER-o The pathway originating in the
motor cortex and terminating in the lower motor neurons or interneurons in the
spinal cord
o Controls movement of the trunk and extremities
Corticobulbar tract - CORRECT ANSWER-o The pathway originating in the
motor cortex and terminating at motor cranial nuclei in brainstem that control the
head, neck and face movement
Somatosensory tract - CORRECT ANSWER-· relay information from
proprioceptors (position and self-movement), mechanoreceptors (touch, pressure,
stretch), nociceptors (pain) and thermoreceptors (temperature) to the contralateral
sensory cortex.
Where is the end of the spinal cord located and what is it called? - CORRECT
ANSWER-conus medullaris. Located between T 12 and L1
Spinal cord blood supply - CORRECT ANSWER-· The anterior spinal artery
(bilateral perfusion), left posterior spinal artery and right posterior spinal artery
along with corresponding segmental arteries are primarily responsible for spinal
cord perfusion.
How many spinal vertebrae are there? - CORRECT ANSWER-o 7 cervical
vertebrae
o 12 thoracic
COPYRIGHT ALL RIGHTS RESERVED ©️ 2025
with Correct Answers | Latest
Update 100% Pass
What spinal nerve root innervates the sternocleidomastoid? - CORRECT
ANSWER-C2 (Spinal Accessory Nerve)
What spinal nerve root innervates the Trapezius? - CORRECT ANSWER-C3, C4
(Spinal Accessory nerve)
What spinal nerve root innervates the deltoid and biceps? - CORRECT
ANSWER-C5, C6
What spinal nerve root innervates the triceps? - CORRECT ANSWER-C7, C8
What spinal nerve root innervates the extensor carpi radialis? - CORRECT
ANSWER-C6, C7
What spinal nerve root innervates the flexor carpi ulnaris? - CORRECT
ANSWER-C8
What spinal nerve root innervates the first dorsal interosseous and the abductor
digiti minimi? - CORRECT ANSWER-C8, T1
,What spinal nerve root innervates the intercostals? - CORRECT ANSWER-T1 -
T11
What spinal nerve root innervates the rectus abdominus? - CORRECT ANSWER-
T5- T12
What spinal nerve root innervates the iliopsoas and the sartorius? - CORRECT
ANSWER-L2, L3
What spinal nerve root innervates the adductor longus? - CORRECT ANSWER-
L2, L3, L4
What spinal nerve root innervates the quadriceps (rectus femoris)? - CORRECT
ANSWER-L3, L4
What spinal nerve root innervates the tibialis anteroir? - CORRECT ANSWER-L4,
L5
What spinal nerve root innervates the biceps femoris and the gastrocnemious? -
CORRECT ANSWER-S1, S2
What spinal nerve root innervates the extensor hallucis longus? - CORRECT
ANSWER-L5, S1
What spinal nerve root innervates the abductor hallucis? - CORRECT ANSWER-
S1-S2
What spinal nerve root innervates the external anal sphincter? - CORRECT
ANSWER-S3, S4
COPYRIGHT ALL RIGHTS RESERVED ©️ 2025
,What muscle corresponds to cranial nerve III (oculomotor)? - CORRECT
ANSWER-Inferior rectus
What muscle corresponds to cranial nerve IV (trochlear)? - CORRECT
ANSWER-Superior oblique
What muscle corresponds to cranial nerve V (trigeminal)? - CORRECT
ANSWER-Temporalis, masseter
What muscle corresponds to cranial nerve VI (abducens)? - CORRECT
ANSWER-Lateral rectus
What muscle corresponds to cranial nerve VII (facial)? - CORRECT ANSWER-
Orbicularis Oculi, Orbicularis oris, mentalis
What muscle corresponds to cranial nerve IX (glossopharyngeal)? - CORRECT
ANSWER-Stylopharyngeus (soft palate)
What muscle corresponds to cranial nerve X (vagus)? - CORRECT ANSWER-
Thryoarytenoid
What muscle corresponds to cranial nerve XI (accessory)? - CORRECT
ANSWER-Trapezius
What muscle corresponds to cranial nerve XII (Hypoglossal)? - CORRECT
ANSWER-Tongue
, Corticospinal tract - CORRECT ANSWER-o The pathway originating in the
motor cortex and terminating in the lower motor neurons or interneurons in the
spinal cord
o Controls movement of the trunk and extremities
Corticobulbar tract - CORRECT ANSWER-o The pathway originating in the
motor cortex and terminating at motor cranial nuclei in brainstem that control the
head, neck and face movement
Somatosensory tract - CORRECT ANSWER-· relay information from
proprioceptors (position and self-movement), mechanoreceptors (touch, pressure,
stretch), nociceptors (pain) and thermoreceptors (temperature) to the contralateral
sensory cortex.
Where is the end of the spinal cord located and what is it called? - CORRECT
ANSWER-conus medullaris. Located between T 12 and L1
Spinal cord blood supply - CORRECT ANSWER-· The anterior spinal artery
(bilateral perfusion), left posterior spinal artery and right posterior spinal artery
along with corresponding segmental arteries are primarily responsible for spinal
cord perfusion.
How many spinal vertebrae are there? - CORRECT ANSWER-o 7 cervical
vertebrae
o 12 thoracic
COPYRIGHT ALL RIGHTS RESERVED ©️ 2025
