SSEP

Question 1

Where does the SSEP pathway originate?

Answer 1

Peripheral Nervous System (PNS)

Question 2

Where should the stimulus occur in the upper extremities for SSEP?

Answer 2

Brachial Plexus

Question 3

Where should the stimulus occur in the lower extremities for SSEP?

Answer 3

Popliteal Fossa

Question 4

What lateral dorsal columns and parts of the body are stimulated in SSEP?

Answer 4

Faciculus cuneatus, upper body

Question 5

What medial dorsal columns and parts of the body are stimulated in SSEP?

Answer 5

Faciculus gracilis, lower body

Question 6

How do fibers decussate the medulla?

Answer 6

Action potential crosses from the synapse in the lower medulla and pass to the contralateral side of the brainstem as internal arcuate fibers.

Question 7

How do the fibers reach the sensory cortex?

Answer 7

Ascends medial leminiscus, goes to ventral posterolateral nucleus, follows internal capsule, and projects to the postcentral gyrus.

Question 8

Upper SSEPS projects more laterally compared to Lower SSEPS which project more medially after being projected to the sensory cortex.

Answer 8

TRUE

Question 9

Which pathway is effected in those who show lhermitte’s sign

Answer 9

Posterior columns, electrical shock down the arms when head is bent forward to chest.