Neuroanatomy of Vocal Mechanism

Question 1

PRIMARY CORTICAL AREAS INVOLVED IN SPEECH-MOTOR CONTROL, INCLUDING PHONATION

Answer 1

• Primary motor cortex
• Broca’s area
• Somatosensory cortex
• Supplementary motor cortex

Question 2

Portion of brain that is key to the coordination of laryngeal muscles for adequate phonation and effective functioning of other speech systems, such as respiration

Answer 2

CEREBELLUM

Question 3

innervates the posterior belly of the digastric muscle

Answer 3

Cranial Nerve VII - Facial nerve

Question 4

includes the primary branches SLN, and RLN that innervate the larynx

Answer 4

CRANIAL NERVE X (VAGUS NERVE)

Question 5

Superior Laryngeal Nerve (SLN)

Answer 5

• has internal and external branches
  
  • internal - recieves all sensory information from larynx
  • external - supplies motor innervation solely to the cricothyroid muscle

Question 6

Recurrent Laryngeal Nerve (RLN)

Answer 6

• supplies all motor innervation to the following muscles:
  
  • interarytenoid
  • posterior cricoarytenoid
  • thyroarytenoid
  • lateral cricoarytenoid
• recieves all sensory information below the vocal folds