Lab 4 pt 2

Question 1

what is the orbicularis oculi function and innervation?

Answer 1

• closes the eye

- facial nerve (CN VII)

Question 2

what is the function and innervation of orbiularis oris?

Answer 2

• purses the lips

- facial nerve (CN VII)

Question 3

what is the function and innervation of the buccinator?

Answer 3

• compresses the cheeks

- facial nerve (CN VII)

Question 4

what is the function and innervation of the temporalis?

Answer 4

• elevates mandible

- trigeminal nerve (CN V)

Question 5

what is the function and innervation of the masseter?

Answer 5

• elevates mandible

- trigeminal nerve (CN V)

Question 6

what is the function and innervation of the sternocleidomastoid?

Answer 6

• both: flexion of neck
• alone: lateral flexion, contralateral rotation of neck
• spinal accessory nerve (CN XI)

Question 7

what is the function of the scalene muscles?

Answer 7

• both: flex neck and elevates ribcage

- alone: lateral flexion of neck

Question 8

what is the function and innervation of the levator palpebrae superioris?

Answer 8

• raises eyelid

- occulomotor nerve (CN III)

Question 9

what is the function and innervation of the superior rectus?

Answer 9

• eye looks up

- occulomotor nerve (CN III)

Question 10

what is the function and innervation of the inferior rectus?

Answer 10

• eye looks down

- occulomotor nerve (CN III)

Question 11

what is the function and innervation of the lateral rectus?

Answer 11

• eye looks laterally

- abducens nerve (CN VI)

Question 12

what is the function and innervation of the medial rectus?

Answer 12

• eye looks medially

- occulomotor nerve (CNIII)

Question 13

what is the function and innervation of the superior oblique?

Answer 13

• eye looks down and laterally

- trochlear nerve (CN IV)

Question 14

what is the function and innervation of the inferior oblique?

Answer 14

• eye looks up and laterally

- occulomotor nerve (CN III)

Question 15

what is the function, insertion, and innervation of the trapezius?

Answer 15

• retracts, elevates, and depresses the scapula
• inserts on the spine of the scapula
• spinal accessory nerve (CN XI)

Question 16

what is the function and insertion of the levator scapulae?

Answer 16

• elevate scapula

- inserts on the superior angle of the scapula

Question 17

what is the function and insertion of the rhomboid majors and minors?

Answer 17

• retract scapula

- inserts on medial border of scapula

Question 18

what is the function and insertion of the supraspinatus?

Answer 18

• abduction of arm

- inserts on greater tubercle of humerus

Question 19

what is the function and insertion of the infraspinatus?

Answer 19

• laterally rotate the arm

- inserts on greater tubercle of humerus

Question 20

what is the function, insertion, and innervation of the teres minor?

Answer 20

• laterally rotate arm
• inserts on greater tubercle of humerus
• axillary nerve

Question 21

what is the function and insertion of the subscapularis?

Answer 21

• medially rotate arm

- inserts on lesser tubercle of the arm

Question 22

what is the function and insertion of the teres major?

Answer 22

• extends, adducts, and medially rotates the arm

- inserts on lesser tubercle of the arm

Question 23

what is the function, insertion, and innervation of the latissimus dorsi?

Answer 23

• extends, adducts, and medially rotates the arm
• lesser tubercle of humerus
• thoracodorsal nerve

Question 24

what is the function of the splenius (capitis and cervicis)?

Answer 24

• both: extension of head and neck

- alone: lateral flexion

Question 25

what is the function of the semispinalis (capitis)?

Answer 25

- both: extension of head and neck | - alone: extension and lateral flexion of head and neck

Question 26

what is the function of the iliocostalis?

Answer 26

extension of vertebral column

Question 27

what is the function of the longissimus?

Answer 27

- both: extension of vertebral column | - alone: lateral flexion

Question 28

what is the function of the spinalis?

Answer 28

extension of vertebral column

Question 29

what is the function and insertion of the pectoralis major?

Answer 29

- adduction and medial rotation of the arm | - insertion on the intertubercular groove

Question 30

what is the function and insertion of the pectoralis minor?

Answer 30

- protraction and depression of scapula | - inserts on coracoid process of scapula

Question 31

what is the function and innervation of the serratus anterior?

Answer 31

- protraction of scapula | - long thoracic nerve

Question 32

what is the function of the external intercostals?

Answer 32

elevates ribcage

Question 33

what is the function of the internal intercostals?

Answer 33

depress ribcage

Question 34

what is the function of the rectus abdominis?

Answer 34

- flexion of vertebral column | - compresses abdomen

Question 35

what is the function of the external obliques?

Answer 35

- flexion of vertebral column | - contralateral rotation

Question 36

what is the function of the internal obliques?

Answer 36

- flexion of vertebral column | - ipsilateral rotation

Question 37

what is the function of the transversus abdominis?

Answer 37

compresses abdomen