MOINA of Neck

Question 1

Origin: deep fascia over pectoralis major and deltoid
Insertion: body of mandible and angle of mouth
Nerve Supply: facial nerve cranial branch
Action: depresses mandible and angle of mouth

Answer 1

Platysma

Question 2

Origin: manubrium sterni and medial third of clavicle
Insertion: mastoid process of temporal bone and occipital bone
Nerve Supply: spinal part of accessory nerve and C2 and 3
Action: two muscles acting together extend head and flex neck; one muscle rotates head to opposite side

Answer 2

Sternocleidomastoid

Question 3

Origin: mastoid process of temporal bone
Insertion: intermediate tendon is held to hyoid by fascial sling
Nerve Supply: facial nerve
Action: depresses mandible or elevated hyoid bone

Answer 3

Posterior Belly

Question 4

Origin: body of mandible
Insertion: intermediate tendon is held to hyoid by fascial sling
Nerve Supply: nerve to mylohyoid
Action: depresses mandible or elevated hyoid bone

Answer 4

Anterior Belly

Question 5

Origin: styloid process
Insertion: body of hyoid bone
Nerve Supply: facial nerve
Action: elevates hyoid bone

Answer 5

Stylohyoid

Question 6

Origin: Mylohyoid line of body of mandible
Insertion: body of hyoid bone and fibrous raphe
Nerve Supply: inferior alveolar nerve
Action: elevates floor of mouth and hyoid bone or depresses mandible

Answer 6

Mylohyoid

Question 7

Origin: Inferior mental spine of mandible
Insertion: body of hyoid bone
Nerve Supply: first cervical nerve
Action: elevates hyoid bone or depresses mandible

Answer 7

Geniohyoid

Question 8

Origin: manubrium sterni and clavicle
Insertion: body of hyoid bone
Nerve Supply: ansa cervicalis; C1, 2, 3
Action: depresses hyoid bone

Answer 8

Sternohyoid

Question 9

Origin: manubrium sterni
Insertion: oblique line on lamina of thyroid cartilage
Nerve Supply: ansa cervicalis; C1, 2, 3
Action: depresses larynx

Answer 9

Sternothyroid

Question 10

Origin: oblique line on lamina of thyroid cartilage
Insertion: lower border of body of hyoid bone
Nerve Supply: first cervical nerve
Action: depressed hyoid bone or elevates larynx

Answer 10

Thyrohyoid

Question 11

Origin: upper margin of scapula and suprascapular ligament
Insertion: intermediate tendon is held to clavicle and first rib by fascial sling
Nerve Supply: ansa cervicalis; C1, 2, and 3
Action: depress hyoid bone

Answer 11

Inferior Belly

Question 12

Origin: lower border of body of hyoid bone
Insertion: intermediate tendon is held to clavicle and first rib by fascial sling
Nerve Supply: ansa cervicalis; C1, 2, and 3
Action: depress hyoid bone

Answer 12

Superior Belly

Question 13

Origin: transverse processes of third, fourth, fifth, and sixth cervical vertebrae
Insertion: first rib
Nerve Supply: C4, 5, and 6
Action: elevates first rib; laterally flexes and rotates cervical part of vertebral column

Answer 13

Scalenus Anterior

Question 14

Origin: transverse processes of upper six cervical vertebrae
Insertion: first rib
Nerve Supply: anterior rami of cervical nerves
Action: elevates first rib; laterally flexes and rotates rotates cervical part of vertebral column

Answer 14

Scalenus Medius

Question 15

Origin: transverse processes of lower cervical vertebrae
Insertion: second rib
Nerve Supply: anterior rami of cervical nerves
Action: elevates second rib; laterally flexes and rotates cervical part of vertebral column

Answer 15

Scalenus Posterior