NBCE Neurology and Neurological Assessment 1

Question 1

Which nerve roots mediate the patellar (knee jerk) reflex?

Accepted Answer

L3-L4

Answer

The patellar reflex tests the L3-L4 nerve roots via the femoral nerve and the quadriceps muscle.

Question 2

The C6 dermatome primarily covers which anatomical area?

Accepted Answer

The thumb, index finger, and lateral forearm

Answer

The C6 dermatome supplies the thumb, index finger, and lateral forearm, making it the key level affected by C5-C6 disc herniations.

Question 3

The Achilles tendon reflex (ankle jerk) primarily tests which nerve root?

Accepted Answer

S1

Answer

The Achilles reflex is mediated by S1 via the tibial nerve and tests the gastrocnemius-soleus complex.

Question 4

An upper motor neuron (UMN) lesion characteristically produces which clinical finding?

Accepted Answer

Hyperreflexia and spasticity

Answer

UMN lesions produce hyperreflexia, spasticity, and a positive Babinski sign due to loss of descending cortical inhibition on spinal reflex arcs.

Question 5

Weakness in great toe extension (extensor hallucis longus) is most indicative of which nerve root compression?

Accepted Answer

L5

Answer

The extensor hallucis longus is primarily innervated by L5 via the deep peroneal nerve, making great toe extension weakness the classic L5 myotomal test.

(NBCE) National Board of Chiropractic Examiners Practice Test

(NBCE) National Board of Chiropractic Examiners Practice Test

NBCE Neurology and Neurological Assessment 1