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Anatomy: Neck > Neck and Back Muscles > Flashcards

Neck and Back Muscles Flashcards

1
Q

What is the action of the sternocleidomastoid?

A

Flexion and rotation of neck

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2
Q

What are the attachments of the sternocleidomastoid?

A

Originates from manubrium and clavicle, inserts into mastoid process of temporal bone

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3
Q

What is the innervation of the sternocleidomastoid?

A

Spinal accessory nerve, CNXI

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4
Q

What is the root value of the spinal accessory nerve? How about the vagus nerve?

A

. Spinal accessory nerve is CNXI

. Vagus nerve is CNX

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5
Q

Where is the levator scapulae found?

A

Deep to the SCM and trapezius

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6
Q

What is the action of the levator scapulae?

A

Elevation and rotation of scapula (allows arm abduction because humerus attached to scapula)

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7
Q

What are the attachments of the levator scapulae?

A

Originates from posterior tubercle of transverse process of C1-C4 inserts into upper medial border of scapula

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8
Q

What is the innervation of the levator scapula?

A

Dorsal scapular nerve and cervical spinal nerve

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9
Q

What is the action of the trapezius?

A

Elevation, depression, rotation, retraction of scapula

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10
Q

What are the attachments of the trapezius?

A

. Originates from external occipital protuberance, nuchal ligament, and spinous processes of C7-T12
. Inserts into lateral third of clavicle, acromion, and scapular spine

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11
Q

What is the innervation of the trapezius?

A

Spinal accessory nerve, CNXI

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12
Q

What is the action of the latissimus dorsi?

A

Extension, adduction, medial rotation at shoulder joint

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13
Q

What are the attachments of the latissimus dorsi?

A

. Originates from spinous processes of T6-T12, inferior 3-4 ribs, and iliac crest
. Inserts into intertubercular sulcus of humerus

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14
Q

What is the innervation of the latissimus dorsi?

A

Thoracodorsal nerve, C6-C8

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15
Q

Where are the relative positions of the rhomboid major and rhomboid minor?

A

Rhomboid minor is superior to rhomboid major

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16
Q

What is the action of rhomboid major?

A

Elevation of scapula

17
Q

What is the action of rhomboid minor?

A

Rotation and retraction of scapula

18
Q

What are the attachments of rhomboid major?

A

Originates from spinous processes of T2-T5, inserts into medial border of scapula

19
Q

What are the attachments of rhomboid minor?

A

Originates from nuchal ligament and spinous processes of C7-T1, inserts into medial end of scapular spine

20
Q

What is the innervation of the rhomboids? Which other back muscle shares this innervation?

A

Dorsal scapular nerve, levator scapulae also innervated by this nerve (along with cervical spinal nerve)

Anatomy: Neck (5 decks)

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