LAE 3 Muscle table

muscle attachments, innervations, and actions

masseter attachments and functions

zygomatic arch, mandibular ramus

elevation of mandible, protraction/retraction/medial excursion of jaw

masseter innvervation

trigeminal nerve

buccinator attachments and function

maxilla, orbicularis oris, lips and cheeks

compresses cheek against teeth, retracts cheek, expels air and liquid

buccinator innervation

facial nerve

sternocleidomastoid attachments and actions

manubrium, clavicle, mastoid process

tilts head (looking over shoulder), rotating head, draws head down, aids in deep breathing

sternocleidomastoid innvervation

spinal nerves c2-4, accessory nerve

pectoralis major attachments and function

clavicle, sternum, costal cartilages 1-7

flexes, adducts, medially rotates humerus. aids in deep breathing.

latissimus dorsi attachments and function

vertebrae t7-l5, lower ribs, iliac crest, intertubercular sulcus of humerus

adducts and rotates humerus, extends shoulder joint (pulling into body), pulls body forward and up (climbing)

latissimus dorsi innervation

thoracodorsal nerve

pectoralis major innervation

medial and lateral pectoral nerves

rectus abdominis attachments and function

pubic symphysis and pubis, xiphoid process, costal cartilage 5-7

flexes waist when bending forward, stabilized pelvis region during walking,

rectus abdominis innveration

anterior spinal nerves t6-12

trapezius attachments and functions

external occipital protuberance, vertebrae c7-t12, acromion and spine of scapula

trapezius innervation

accessory nerve

diaphragm attachment and function

xiphoid process, costal cartilages 7-12, central tendon of diaphragm

prime mover of inspiration, sneezing/laughing etc., compresses abdomen in urination, BMs, and childbirth

diaphragm innervation

phrenic nerve

deltoid function

flex and rotate arm, abduct arm, adjustment of hand height

deltoid innervation

axillary nerve

rhomboid major attachment and function

vertebrae t2-3, medial border of scapula

retracts scapula, braces shoulder

rhomboid major innervation

posterior scapular nerve

biceps brachii function

supination of forearm, flexion of elbow, stabilizes shoulder

triceps brachii function

extends elbow, extends and adducts humerus

triceps brachii innvervation

radial nerve

biceps brachii innvervation

musculocutaneous nerve

flexor carpi ulnaris attachment

medial epicondyle of humerus, metacarpal 5, hamate

extensor digitorum functions

extends wrist and pharangeal  joints, spreads digits apart

extensor digitorum innvervation

radial nervw

flexor carpi ulnaris innvervation

ulnar nerve

gluteus maximus attachment and function

gluteal line, posterior iliac crest, posterior surface of sacrum

extends thigh, abducts thigh, prevents trunk from pitching forward

rectus femoris attachment and function

ilium anterior spine and inferior spine, joint capsule of hip

extends knee, flexes thigh at hip

biceps femoirs

flexes knee, elevates hip, elevates trunk after stopping

adductor longus

adducts and rotates thigh, flexes thigh at hip

gastrocnemius

condyles and popliteal surface of femur, capsule of knee joint, calcaneus

plantar flexes foot, active in walking/running

tibialis anterior

condyle of tibia, medial cuneiform of metatarsal

dorsiflexes and inverts foot, supports arch of foot

tibialis anterior innvervation

deep fibular nerve

gastrocnemius innvervation

tibial nerve

adductor longus innvervation

obturator nerve

rectus femoris innvervation

femoral nerve

gluteus maximus inntervation

inferior gluteal nerve

extensor digitorum innvervation

radial nerve