Muscles of the Neck

Question 1

What is the Action and Innervation for Trapezius M?

Answer 1

A: Extends neck bilaterally

Unilaterally: Laterally flexes neck and rotates face away

N: Spinal accessory N

Question 2

What is the Action and Innervation for Sternocleidomastoid?

Answer 2

A: Extends neck at atlantooccipital joint (bilaterally)

Flexes remaining neck (bilaterally)

Unilaterally: laterally flexes neck and rotates face away

N: Spinal Accessory N

Question 3

What is the Action and Innervation for Levator Scapulae?

Answer 3

A: Extends neck (bilaterally)

Laterally flexes neck (unilaterally)

N: Dorsal Scapular N

Question 4

What is the Action and Innervation for Splenius Capitus?

Answer 4

A: Extends neck (bilaterally)

Laterally flexes neck and rotates face toward (unilaterally)

N: Posterior Rami C3-C5

Question 5

What is the Action and Innervation for Anterior Scalene M?

Answer 5

A: Flexes neck (bilaterally)

Laterally flexes neck (unilaterally)

Elevates first rib

N: Anterior Rami C4-C6

Question 6

What is the Action and Innervation for Middle Scalene M?

Answer 6

A: Flexes neck (bilaterally)

Laterally flexes neck (unilaterally)

Elevates first rib

Question 7

What is the Action and Innervation for Posterior Scalene M?

Answer 7

A: Laterally flexes neck (unilaterally)

Elevates 2nd rib

N: Anterior Rami C6-C8

Question 8

What is the Action and Innervation for Myohyoid M?

Answer 8

A: Elevates hyoid B

Elevates floor of mouth and tongue

N: Nerve to Myohyoid

Question 9

What is the Action and Innervation for Geniohyoid M?

Answer 9

A: Elevates Hyoid B

Shortens floor of mouth

Widens pharynx

N: C1 via hypoglossal N

Question 10

What is the Action and Innervation for Diagastric M?

Answer 10

A: Elevates hyoid B

Steadies hyoid B

Depresses Mandible

N: Anterior belly - N to myohyoid

Posterior belly - Facial N

Question 11

What is the Action and Innervation for Stylohyoid M?

Answer 11

A: Elevates hyoid B

Retracts hyoid B

Elongates floor of mouth

N: Facial N

Question 12

What is the Action and Innervation for Sternohyoid M?

Answer 12

A: Depresses hyoid B

N: Ansa Cervicalis (C1-C3)

Question 13

What is the Action and Innervation for Sternothyroid M?

Answer 13

A: Depresses thyroid cartilage

N: Ansa cervicalis (C2-C3)

Question 14

What is the Action and Innervation for Thyrohyoid M?

Answer 14

A: Depresses hyoid B

Elevate thyroid carilage

N: C1 via hypoglossal N

Question 15

What is the Action and Innervation for Omohyoid M?

Answer 15

A: Depresses hyoid B and retracts hyoid B

N: Ansa Cervicalis C1-C3

Question 16

What is the Action and Innervation for Platysma M?

Answer 16

A: Draws corner of the mouth inferiorly

Draws skin of neck superiorly

N: Cervical branch of facial N

Question 17

What is the Action and Innervation for Rectus capitus posterior major M?

Answer 17

A: Extends head and rotates face toward

N: Suboccipital N (posterior ramus 1st cervical spine n)

Question 18

What is the Action and Innervation for Rectus capitis posterior minor M?

Answer 18

A: Extends head

N: Suboccipital N (posterior ramus 1st cervical spinal N)

Question 19

What is the Action and Innervation for Obliquus superior M?

Answer 19

A: Extends head and laterally flexes head

N: Suboccipital N (posterior ramus 1st cervical spinal N

Question 20

What is the Action and Innervation for obliquus campitis inferior M?

Answer 20

A: Rotates face toward

N: suboccipital N (posterior ramus 1st cervical spinal n)

Question 21

What is the Action and Innervation for Superior pharyngeal constrictor M?

Answer 21

A: Constricts pharyngeal wall

N: Pharygneal branch of the vagus N

Question 22

What is the Action and Innervation for Middle Pharyngeal constrictor M?

Answer 22

A: Constricts pharyngeal wall

N: Phayngeal branch of vagus nerve

branches of recurrent laryngeal N

Question 23

What is the Action and Innervation for inferior pharyngeal constrictor M?

Answer 23

A: Constricts pharyngeal wall

N: Phayngeal branch of vagus nerve

branches of recurrent laryngeal N

Question 24

What is the Action and Innervation for Palatopharyngeus M?

Answer 24

A: Elevates the pharynx

Elevates the larynx

N: Pharyngeal branch of vagus N

Question 25

What is the Action and Innervation for **Salipingopharyngeus M?**

Answer 25

A: Elevates pharynx Elevates larynx N: Pharyngeal branch of vagus N

Question 26

What is the Action and Innervation for **st****ylopharyngeus M?**

Answer 26

A: Elevates pharynx and Elevates larynx N: Glossopharyngeal N

Question 27

What is the Action and Innervation for **Cricothyroid M?**

Answer 27

A: Stretches vocal l. Tenses vocal l. N: External laryngeal N

Question 28

What is the Action and Innervation for **posterior cricoarytendoid M?**

Answer 28

A: Abducts vocal fold N: Recurrent laryngeal N

Question 29

What is the Action and Innervation for **Lateral cricoarytenoid M?**

Answer 29

A: Adducts vocal fold N: Reccurent Laryngeal N

Question 30

What is the Action and Innervation for **Transverse and oblique Arytenoid M?**

Answer 30

A: Adducts arytendoid cartilage closes intercartilaginous part of rima glottids N: Reccurent laryngeal N

Question 31

What is the Action and Innervation for **Thyroarytendoid M?**

Answer 31

A: Relaxes vocal l. N: Reccurent laryngeal N

Question 32

What is the Action and Innervation for **Vocalis M?**

Answer 32

A: Relaxes posterior part of Vocal l. Tenses anterior part of vocal l. N: Reccurent laryngeal N

Question 33

What is the Action and Innervation for **Longus Colli M?**

Answer 33

A: Flexes neck (bilaterally) Laterally flexes neck (unilaterally) Rotates face away N: Anterior rami C2-C6

Question 34

What is the Action and Innervation for **Longus Capitis M?**

Answer 34

A: flexes neck (bilaterally) Laterally flexes neck (unilaterally) N: Anterior Rami C1- C3

Question 35

What is the Action and Innervation for **Rectus Capitis Anterior M?**

Answer 35

A: Flexes atlanooccipital joint N: Anterior rami C1-C2

Question 36

What is the Action and Innervation for **Rectus Capitis Lateralis M?**

Answer 36

A: Laterally flexes atlantooccipital joint N: Anterior rami C1-C2