NCS Exam Questions and Answers
The trigeminal (Vth cranial) nerve receives sensation from the - ANSWER-face
The distance used to stimulate the spinal accessory nerve is - ANSWER-10 cm
Conduction velocity is recorded in - ANSWER-meters per second
Cool extremities can cause - ANSWER-Higher amplitudes, prolonged distal latencies
and slower conduction velocities
The active recording electrode location for the sural sensory study is placed where? -
ANSWER-behind (posterior) to the lateral malleolus
What EMG referral might be a reason for doing an H -Reflex? - ANSWER-S1
radiculopathy
Temperature guidelines for the hand - ANSWER-30.5 - 32.0 C
What is the water temperature if you need to warm a patient - ANSWER-104 F
Ulnar Sensory Palmar distal distance - ANSWER-8.0 cm
Radial Sensory Antidromic distal distance should be measured at - ANSWER-10.0
cm
The brachial plexus is formed by the contributions arising from which set of nerve
roots - ANSWER-C5-T1
The medial antebrachial nerve arises from what cervical roots - ANSWER-C8-T1
The most common recording site for the median motor is - ANSWER-APB -
(abductor pollicis brevis)
Ulnar nerve wrist stimulation site is adjacent to what tendon? - ANSWER-flexor carpi
ulnaris
How many centimeters proximal to the medial epicondyle should you stimulate the
ulnar nerve when at the above elbow site - ANSWER-5.0 cm
Median (Lumbrical) distance - ANSWER-9.0 cm
What nerve roots supply the axillary nerve - ANSWER-C5-C6
, The cell bodies of sensory neurons are located in the - ANSWER-dorsal root
ganglion
Conduction velocity is calculated by - ANSWER-Proximal distance divided by
difference in time
Horizontal markers measure amplitude and this is a reflection of - ANSWER-size
Recording electrodes for medial antebrachial sensory are placed - ANSWER-medial
forearm
Recording electrodes for median palmar orthodromic sensory are placed on the -
ANSWER-wrist between palmaris longus and flexor carpi radialis tendons and over
the brachial artery above the elbow crease
Thermistor in the hand is placed on what muscle - ANSWER-FDI First Dorsal
Interosseous
When performing motor nerve conduction studies, the active and reference
electrodes should be placed - ANSWER-Active over the muscle and the reference
off the muscle on bone or tendon
Superficial Fibular Sensory study distance should be? - ANSWER-14.0 cm
The accessory deep fibular nerve is an anatomical variant that arises from the
superficial fibular nerve and innervates which muscle? - ANSWER-Extensor
Digitorum Brevis (EDB)
The muscle used to record the facial motor nerve conduction study is the -
ANSWER-nasialis
The spinal accessory nerve innervates the sternocleidomastoid and
______________________muscles - ANSWER-trapezius
Lateral plantar sensory distance should be? (give the range) - ANSWER-14-16 cm
The major muscle the lateral plantar nerve innervates is the? - ANSWER-abductor
digiti minimi pedis
Nerve Conduction Studies measure - ANSWER-Large myelinated fibers
What information can be gained by doing nerve conduction studies - ANSWER-Tests
the integrity of the nerve, neuromuscular junction and muscle
We measure the nerve conduction of the VII th cranial nerve which is called the -
ANSWER-facial nerve
When stimulating the trigeminal nerve in a "Blink Reflex" study the recording
electrodes are placed over the - ANSWER-orbicularis oculi
The trigeminal (Vth cranial) nerve receives sensation from the - ANSWER-face
The distance used to stimulate the spinal accessory nerve is - ANSWER-10 cm
Conduction velocity is recorded in - ANSWER-meters per second
Cool extremities can cause - ANSWER-Higher amplitudes, prolonged distal latencies
and slower conduction velocities
The active recording electrode location for the sural sensory study is placed where? -
ANSWER-behind (posterior) to the lateral malleolus
What EMG referral might be a reason for doing an H -Reflex? - ANSWER-S1
radiculopathy
Temperature guidelines for the hand - ANSWER-30.5 - 32.0 C
What is the water temperature if you need to warm a patient - ANSWER-104 F
Ulnar Sensory Palmar distal distance - ANSWER-8.0 cm
Radial Sensory Antidromic distal distance should be measured at - ANSWER-10.0
cm
The brachial plexus is formed by the contributions arising from which set of nerve
roots - ANSWER-C5-T1
The medial antebrachial nerve arises from what cervical roots - ANSWER-C8-T1
The most common recording site for the median motor is - ANSWER-APB -
(abductor pollicis brevis)
Ulnar nerve wrist stimulation site is adjacent to what tendon? - ANSWER-flexor carpi
ulnaris
How many centimeters proximal to the medial epicondyle should you stimulate the
ulnar nerve when at the above elbow site - ANSWER-5.0 cm
Median (Lumbrical) distance - ANSWER-9.0 cm
What nerve roots supply the axillary nerve - ANSWER-C5-C6
, The cell bodies of sensory neurons are located in the - ANSWER-dorsal root
ganglion
Conduction velocity is calculated by - ANSWER-Proximal distance divided by
difference in time
Horizontal markers measure amplitude and this is a reflection of - ANSWER-size
Recording electrodes for medial antebrachial sensory are placed - ANSWER-medial
forearm
Recording electrodes for median palmar orthodromic sensory are placed on the -
ANSWER-wrist between palmaris longus and flexor carpi radialis tendons and over
the brachial artery above the elbow crease
Thermistor in the hand is placed on what muscle - ANSWER-FDI First Dorsal
Interosseous
When performing motor nerve conduction studies, the active and reference
electrodes should be placed - ANSWER-Active over the muscle and the reference
off the muscle on bone or tendon
Superficial Fibular Sensory study distance should be? - ANSWER-14.0 cm
The accessory deep fibular nerve is an anatomical variant that arises from the
superficial fibular nerve and innervates which muscle? - ANSWER-Extensor
Digitorum Brevis (EDB)
The muscle used to record the facial motor nerve conduction study is the -
ANSWER-nasialis
The spinal accessory nerve innervates the sternocleidomastoid and
______________________muscles - ANSWER-trapezius
Lateral plantar sensory distance should be? (give the range) - ANSWER-14-16 cm
The major muscle the lateral plantar nerve innervates is the? - ANSWER-abductor
digiti minimi pedis
Nerve Conduction Studies measure - ANSWER-Large myelinated fibers
What information can be gained by doing nerve conduction studies - ANSWER-Tests
the integrity of the nerve, neuromuscular junction and muscle
We measure the nerve conduction of the VII th cranial nerve which is called the -
ANSWER-facial nerve
When stimulating the trigeminal nerve in a "Blink Reflex" study the recording
electrodes are placed over the - ANSWER-orbicularis oculi
