Chapter 65 : Laryngeal Reinnervation

Question 1

Most commonly used donor nerve in laryngeal reinnervation

Answer 1

ansa cervicalis

Question 2

In 1909, He Performed neurorrhaphy of the RLN and reported the first successful vocal fold innervation

Answer 2

Horsley

Question 3

activity and anatomy of this nerve makes it an excellent candidate for reinnervation of the PCA

Answer 3

Phrenic nerve

Question 4

two most common reinnervation techniques that have been applied to the problem of laryngeal paralysis in patients are:

Answer 4

Neuromuscular pedicle and ansa cervicalis to RLN anastomosis/transfer

Question 5

The neuromuscular pedicle technique involves placement of the distal portion of the ansa cervicalis branch to what muscle

Answer 5

omohyoid muscle

Question 6

Laryngeal muscles have what type of muscle fibers

Answer 6

high-velocity, low tension

Question 7

PCA appears to be mostly made up of this kind of muscle fibers, being consistent with the peak contraction time at 40msec

Answer 7

Type 2A

Question 8

Peak contraction time of Thyroarytenoid muscle

Answer 8

14 msec

Question 9

Peak contration time of Lateral cricoarytenoid muscle

Answer 9

19 msec

Question 10

Peak contraction time of thyrohyoid and sternothyroid

Answer 10

50msec

Question 11

Laryngeal muscles appear to atrophy at different rates, however by __ weeks, all laryngeal muscles are already fibrosed

Answer 11

8 weeks

Question 12

This technique attempts to transfer a nerve with a portion of its motor units intact to a denervated muscle

Answer 12

Neuromuscular pedicle technique