PHYS 141 Lab Exam 2 Study Material

O/I

origin/insertion are attachment points for muscles

trapezius location

back muscle from occipital bone to clavicle

trapezius function

extends head and moves scapula

latissimus dorsi location

on the back at the lower spine to intertubercular sulcus

levator scapulae location

on the back from cervical vertebrae to scapula

latissimus dorsi function

extends, adducts and medially rotates the arm

supraspinatus location

above the spine of the scapula (on the back of the shoulder blade)

supraspinatus function

abduction of the arm

infraspinatus location

below the spine of the scapula (on the back of the shoulder blade)

infraspinatus function

lateral rotation of the arm

teres major location

on the back from scapula to intertubercular sulcus

teres major function

brachial adduction

teres minor location

on the back from scapula to greater tubercle (above teres major)

teres minor function

lateral rotation of the arm

rhomboid major and minor location

on the back from thoracic vertebrae to scapula

rhomboid major and minor function

stabilized scapula

biceps brachii location

front of brachia

biceps brachii function

elbow flexion (main job) and supination of the forearm

triceps brachii location

back of brachia to elbow

triceps brachii function

extends the elbow (straightens the forearm)

Brachioradialis location

humerus to radius

brachioradialis function

forearm flexion

brachialis location

humerus to ulna

brachialis function

forearm flexor

coracobrachialis location

armpit

coracobrachialis function

arm adductor & flexor

anconeus location

elbow

anconeus function

elbow extension

pronator teres location

around the elbow

pronator teres function

pronation; turning the hand palms down

flexor carpi radialis location

laterally under elbow

flexor carpi radialis function

flexes the wrist and abducts the hand (thumb side)

flexor carpi ulnaris location

under elbow & medial

flexor carpi ulnaris function

flexes the wrist and adducts the hand (pinky side)

flexor digitorum superficialis (FDS) location

from elbow to phalanges

flexor digitorum superficialis (FDS) function

prime hand and finger flexor

extensor carpi radialis location

extends from humerus to hand

extensor carpi radialis function

extends the wrist and abducts the hand (thumb side)

extensor carpi ulnaris location

stretches from ulna to pinky finger

extensor carpi ulnaris function

extends the wrist and adducts the hand (pinky side)

extensor digitorum location

back of forearm

extensor digitorum function

prime mover of finger extension

iliopsoas location

iliac crest & lumbar spine

iliopsoas function

flexes trunk and thigh at hip joint

tensor fasciae latae (TFL) location

anterior lateral portion of hip

tensor fasciae latae (TFL) function

flexes, abducts and medially rotates the thigh; steadies the trunk

sartorius location

anterior superior iliac spine (ASIS)

sartorius function

flexes thigh and lower leg

adductor magnus location

stretches from pubic symphysis to the knee joint

adductor magnus function

adducts and rotates thigh

adductor longus location

stretches between pubic symphysis to femur

adductor longus function

pulls leg inward

adductor brevis location

medial part of thigh

adductor brevis function

pulls leg inward

pectineus location

anterior medial of thigh

pectineus function

hip flexion

gracilis location

stretches from pubic symphysis to below the knee

gracilis function

adducts the thigh; flexes the leg at the knee

4 muscles of the quadriceps

1. rectus femoris

2. vastus lateralis

3. vastus medialis

4. vastus intermedius

3 muscles of the gluteus

1. maximus

2. medius

3. minimus

most superficial muscle of the gluteus

gluteus maximus

biceps femoris location

back lateral side of the thigh

biceps femoris function

bends knee

Semitendinosus location

back medial side of thigh

semitendinosus function

hip extension & knee flexion

3 muscles of the hamstring

1. biceps femoris

2. semitendinosus

3. semimembranosus

fibularis longus location

superior and posterior portion of the calf

fibularis longus function

plantar flexion and eversion

fibularis brevis location

inferior lateral part of calf that wraps around ankle and under foot

fibularis brevis function

plantar flexion and eversion

tibialis anterior location

shins

what is the muscle responsible for shin splints?

tibialis anterior

tibialis anterior function

prime mover of foot & supports arch

extensor digitorum longus location

stretches from shin to toes

extensor digitorum longus function

extends the toes and dorsiflexes the foot

gastrocnemius location

crosses knee joint on posterior calf

gastrocnemius funcion

plantar flexion

flexion

decreasing the angle between two body parts

extension

increasing the angle between two body parts

adduction

moves body parts towards the midline of the body

abduction

move body part away from the midline of the body

lateral rotation

rotation away from the midline

medial rotation

rotation toward the midline

pronation

palm turns down (forearm); foot rolls inward

supination

palm turns up (forearm); foot rolls outward.

inversion

sole of foot turns inward

eversion

sole of the foot turns outward

plantarflexion

foot flexes downward away from the shin

dorsiflexion

foot flexing upward towards the shin

prime moveres

primary mover of the body part

synergists

supporting muscles that assist prime movers

fixators

stabilize prime mover muscles

rectus

straight

transverse

runs against the grain of the muscle

oblique

angled

deltoid

triangular shaped muscle

trapezius

trapezoid

maximus

big

minimus

small

longus

long