Neuro Lecture 2

Question 1

Compares the latency of long & short segments of motor & sensory nerves, in order to calculate the velocity of conduction.

Answer 1

Nerve conduction study

Question 2

Stimulates a motor neuron in retrograde. The action potential travels to the spinal cord, then back down the same nerve to a muscle, where it is measured.

Answer 2

F-wave study

Question 3

What portion of the nerve do the “F-wave” study and “H-reflex” test?

Answer 3

proximal portion of a nerve

Question 4

study stimulates a sensory neuron in retrograde. The action potential travels to the spinal cord, then back down a motor nerve to a muscle, where it is measured.

Answer 4

H-refelx

Question 5

WHat is NCS used for?

Answer 5

Testing for peripheral neuropathies

Question 6

A test of the electrical activity of skeletal muscle.

Answer 6

Electromyography

Question 7

Who treat muscular disorders?

Answer 7

Neurology

Question 8

What are the two types of EMG?

Answer 8

needle EMG

Surface EMG

Question 9

what are surface EMGs good for?

Answer 9

Muscles of the face

Question 10

What muscles show fassciculations?

Answer 10

Deinervated muscle tissue

Question 11

When will you have huge muscle rxns to EMG?

Answer 11

Reinervated muscles

Question 12

invasive procedure to evaluate pathologies of the intervertebral discs, and to evaluate a patient’s candidacy for surgical discectomy.

Answer 12

Discography

Question 13

Who are discographies reserved for?

Answer 13

Patients whose painful symptoms cna’t be explained by findings on MRI/ CT, don’t respond to conservative measures

Question 14

What is done after discography to identify contrast agent leakage from discs, which represent a tear in the outer fibrous ring of the disc.

Answer 14

Lumbar CT

Question 15

When you do a nerve root block where do you inject the anesthetic?

Answer 15

Posterior part (sensory part) of the foramen

Question 16

electrical potentials recorded from the nervous system following a stimulus.Recording is done in the CNS. A lot are done while patient is under general anesthesia.

Answer 16

Evoked Potentials

Question 17

What are the 4 main types of evoked poentials.

Answer 17

Audistory
Visual
Somatosensory
Motor

Question 18

If there are abnormal auditory evoked poentials, what can be the cause?

Answer 18

Hearing loss
Acoustic neuroma
MS
Stroke

Question 19

What can abnormal results of a visual evoked potential be a sign of?

Answer 19

Optic neuritis
MS
Other neuronal dysfnction from retina to visual cortex

Question 20

Scalp electrodes measure response to sensory stimulation. Usually TENS. Used for continuous monitoring during surgeries where there is high risk of inadvertent ischemia or damage to cortex or spinal cord.

Answer 20

Somatosensory evoked potentials.

Question 21

Use electrodes to measure the response with the skull open. Direct stimulation of exposed motor cortex.

Answer 21

Motor evoked potential