Head & Neck

Question 1

Pharyngeal constrictors:

1. movement
2. innervation

Answer 1

1. constrict pharynx during swallowing

2. pharyngeal plexus of vagus nerve

Question 2

Stylopharyngeus:

1. origin
2. insertion
3. movement
4. innervation

Answer 2

1. styloid process of temporal bone
2. thyroid cartilage
3. elevates pharynx and layrnx during swallowing and speech
4. glossopharyngeal

Question 3

Sternocleidomastoid:

1. origin
2. insertion
3. movement
4. innervation
5. arterial supply

Answer 3

1. sternal head - manubrium, clavicular head - medial 1/3 clavicle
2. mastoid process of temporal bone
3. tilts head, flexes & rotates neck
4. accessory nerve
5. occipital & superior thyroid

Question 4

Sternohyoid:

1. origin
2. movement

Answer 4

1. manubrium & medial 1/3 clavicle

2. depresses hyoid bone after swallowing

Question 5

Sternothyroid:

1. origin
2. movement

Answer 5

1. manubrium & 1st costal cartilage

2. depresses larynx

Question 6

Omohyoid:

1. action

Answer 6

1. depresses hyoid bone

Question 7

Cricothyroid:

1. movement
2. innervation

Answer 7

1. stretches & tense vocal folds

2. external branch of superior laryngeal nerve (CN X)

Question 8

Posterior cricoarytenoid:

1. action
2. innervation

Answer 8

1. abducts vocal folds (& widens rima glottidis)

2. recurrent laryngeal nerve (CN X)