Anatomy, Neuroanatomy, Physiology Of Speech Mech

Front 1

Intercostal muscles

Back 1

• Muscles between ribs, critical for respiration
• 11 paired internal intercostals pull ribs DOWN to decrease the diameter of the thoracic cavity for exhalation
• 11 paired the external intercostals RAISE the ribs up and out to increase the diameter of the thoracic cavity for inhalation
  

Front 2

Intrinsic Laryngeal Muscles

Back 2

• primarily responsible for controlling sound production
  

Front 3

Which nerve is the intrinsic muscles innervated by?

Back 3

• The intrinsic muscles are innervated by the Vagus Nerve (X)
• most innervated by the recurrent laryngeal branch of the Vagus Nerve
  

Front 4

What is the function of the lateral cricoarytenoid?

Back 4

• Adducts vocal folds, increases medial compression
  

Front 5

What is the function of the transverse arytenoid?

Back 5

Adducts vocal folds

Front 6

What is the function of the oblique arytenoid?

Back 6

• pulls apex of arytenoids in a medial direction
  

Front 7

What is the function of the criocothyroid?

Back 7

• lengthens and tenses the vocal fold
  

Front 8

What is the function of the posterior cricoarytenoid?

Back 8

• abducts vocal folds
  

Front 9

What is the function of the thyroarytenoid?

Back 9

• Internal thyroarytenoid is the primary portion of the thyroarytenoid muscle, which ibrates and produces sound
  

Front 10

Extrinsic laryngeal muscles

Back 10

• support the larynx and fits its position. All are attached to the hyoid bone and lower or raise the position of the larynx within the neck
  

Front 11

Which nerves are the extrinsic muscles innervated by?

Back 11

• Trigeminal (V)
• Facial (VII)
• Vagus (X)
• Hypoglossal (XII)
  

Front 12

Myoelastic-Aerodynamic Theory & Bernoulli Effect

Back 12

• The vocal folds vibrate because of the forces and pressures of air and elasticity of the vocal folds
• The Bernoulli Effect is caused by increased speed of air passing between the vocal folds, “sucking” motion of the vocal folds towards one another
  

Front 13

Mucosal Wave Action

Back 13

• the epithelium & lamina propria and intermediate & deep layers over the vocalis muscle slide and produce a wave