49 terms

LAB EXAM 4 OIANS

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massester
O: zygomatic arch
I: mandible
A: elevates mandible
N: mandibular branch of trigeminal nerve (CN V)
digastric
O: mandible and mastoid processes
I: hyoid bone
A: opens mouth and lowers mandible
mylohyoid
O: mandible
I: hyoid bone
A: elevates hyoid during swallowing
sternohyoid
o: manubrium and clavicle
i: hyoid bone
a: depresses hyoid and larynx
risorius
a: draws back angle of mouth
buccinator
A: compresses cheek and holds food between teeth during chewing
mentalis
A: protrudes lower lip, wrinkles chin
Sternocleidomastoid
o: manubrium and clavicle
i: mastoid process
a: singly rotates head to opposite shoulder; together flexes head
frontalis
o: frontal bone
i: skin around eyebrows and nose
a: raises eyebrows and wrinkles forehead
n: facial nerve
orbicularis oris
a: closes and protrudes lips
n: facial nerve
orbicularis oculi
A: closes eye
n: facial nerve
temporalis
A: elevates mandible
levator scapulae ventralis
O: transverse process of atla; C1-C4
Insertion: medial border of scapula
A: elevates scapula; pulls scapula upward and medially, bends neck laterally
N: scapular nerve
trapezius
O: external protuberance of occipital bone; spinous processes of vertebrae C1-T12
I: posterior border of the lateral third of the clavicle, acromion process, and spine of scapula
A: rotation, retraction, elevation, and depression of scapula
N: accessory nerve (cranial nerve XI)
latissimus dorsi
o: lower spine and iliac crest
i: intertubercular groove of humerus
a: extends, adducts, and medially rotates arm at shoulder joint
serratus anterior
O: anterior surface of first 8 ribs
I: medial borderof scapula
A: abducts and stabilizes scapula, assists in upward rotation.
N: long thoracic nerve
rhomboideous major
o: spinous process of T2-T5
i: medial border of scapula
a: retracts and elevates the scapula
n: dorsal scapular nerve
pectoralis major
o: clavicle, sternum, costal cartilages
i: greater tubercle of humerus
a: flexes, adducts, and medially rotates arm at shoulder joint
pectoralis minor
o: ribs 3-5
i: coracoid process of scapula
a: draws scapula anteriorly and inferiorly
n: medial pectoral nerve
deltoid
o: clavicle, acromion, and scapular spine
i: deltoid tuberosity of humerus
a: abducts, flexes, extends, and rotates arm at shoulder joint
n: axillary nerve
supraspinatus
O: supraspinous fossa of scapula
I: greater tubercle of humerus
A: abducts arm at shoulder joint, stabilizes shoulder
N: suprascapular nerve
infraspinatus
O: infraspinous fossa of scapula
I: greater tubercle of humerus
A: laterally rotates arm at shoulder joint
N: suprascapular nerve
teres major
O: lower lateral border and inferior part of scapula
I: intertubercular groove of humerus
A: extends, adducts, and medially rotates arm at shoulder joint
teres minor
o: lateral border of of scapula
i: greater tubercle of humerus
a: laterally rotates and adducts arm at shoulder joint
n: axillary nerve
subscapularis
o: subscapular fossa of scapula
i: lesser tubercle of humerus
a: medially rotates arm at shoulder joint
n: subscapular nerve
aconeus
a: extends forearm at elbow joint
n: radial nerve
triceps brachii
o: long head - infraglenoid tubercle of scapula, long head and medial head - posterior humerus
i: olecranon process of ulna
a: extends forearm at elbow joint
n: radial nerve
biceps brachii
o: short head - coracoid process of scapula, long head - supraglenoid tubercle of scapula
i: radial tuberosity
a: flexes and supinates forearm at elbow joint; flexes arm at shoulder joint
n: musculocutaneous nerve
brachialis
a: flexes arm at elbow joint
flexor carpi ulnaris
a: flexes wrist, adducts hand
n: ulnar nerve
palmaris longus
a: tenses skin and fascia of palm; weakly flexes wrist
n: median nerve
flexor carpi radialis
a: flexes wrist, abducts hand
n: median nerve
pronator teres
a: pronates and flexes forearm
n: median nerve
supinator
a: supinates forearm
n: deep radial nerve
brachioradialis
a: flexes forearm at elbow joint
n: radial nerve
extensor carpi radialis
a: extends and abducts wrist
n: radial nerve
extensor digitorum communis
a: extends fingers and wrist, abducts fingers
n: radial nerve
extensor carpi ulnaris
a: extends and adducts wrist
n: radial nerve
external intercostals
o: inferior border of ribs
i: superior border of ribs
a: elevate rib cage for inspiration
internal intercostals
o: superior border of ribs
i: inferior border of ribs
a: depress rib cage for forced expiration
external oblique
o: ribs 5-12
i: anterior iliac crest and linea alba
a: flexes and rotates vertebral column; compresses abdomen
transverse abdominus
o: anterior iliac crest, cartilages of ribs 6-12
i: linea alba, xiphoid process and pubic symphysis
a: compresses adbomen
rectus abdominis
o: pubic crest and pubic symphysis
i: costal cartilages of ribs 5-7 and xiphoid process
a: flexes vertebral column; compresses abdomen
n: intercostal nerves
tensor fascia latae
O: iliac crest, anterior superior iliac spine
I: iliotibial tract
A: steadies trunk on thigh
gluteus medius
o: ilium
i: greater trochanter of the femur
a: abducts and rotates thigh at hip joint
n: superior gluteal nerve
gluteus maximus
o: illium, sacrum, coccyx
i: gluteal tuberosity of femur
a: extends, laterally rotates thigh at hip; abducts the thigh
n: inferior gluteal nerve
sartorius
o: anterior superior iliac spine
i: proximal tibia
a: flexes leg at knee joint, abducts and laterally rotates thigh at hip joint
n: femoral nerve
gracilis
o: inferior border of pubis
i: medial surface of tibia
a: adducts thigh; flexes and medially rotates leg at knee joint
n: obturator nerve
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