Cranial Nerve Palsy - XI : Accessory Nerve

Question 1

Motor Functions of the Accessory Nerve.

Answer 1

1. Trapezius.

2. Sternocleidomastoid.

Question 2

Aetiology of Accessory Nerve Palsy.

Answer 2

1. Iatrogenic e.g. Cervical Lymph Node Excision Biopsy or Central Line Insertion.

Question 3

Clinical Features of Accessory Nerve Palsy (2).

Answer 3

1. Muscle Wasting and Partial Paralysis of SCM - Inability to Rotate head or Weakness in Shrugging Shoulders.
2. Asymmetrical Neckline.