Anatomy Chap 9

Large, broad muscle located over the middle and lower back, lowers the shoulders and brings the arms back as in swimming and rowing

Latissimus Dorsi

group of muscles that extend or straighten the leg at the knee, as in kicking a football

Quadriceps Femoris

longest muscle in the body: used to sit cross legged

Sartorius

jagged muscle the resembles the teeth of a saw, lowers the shoulder and moves the arm, as in pushing a cart

Serratus Anterior

an extension of the sarcolemma or cell membrane that penetrates into the anterior of the muscle, the electrical signal runs along this membrane toward the SR

T tubule

muscle that shrugs the shoulders and hyperextends the head

Trapezius

Includes the internal oblique, external oblique, transversus, and rectus

abdominal muscles

the troponin-tropomyosin complex and this protein are called the thin filament

actin

thin protein filaments that extend toward the center of the sarcomere from the Z lines

actin

muscles located on the medial(inner) surface if the thigh, horseback riders use these muscles to grip the horse with their thighs

adductors

muscle that opposes the action of another muscle

antagonist

flat sheetlike fascia that attached muscle to muscle or bone to bone

aponeuronsis

classified as disuse, denervation, and senile

atrophy

wasting away or decrease in the size of muscle

atrophy

muscles that flexes the forearm: when you ask a child to "make a muscle" this is the one that pops up

biceps brachii

the brachialis and the brachioradialis work synergistically with this muscle to flex the forearm at the elbow

biceps brachii

arm

brachii

short

brevius

muscle that flattens the cheek when contracted: positions the food for chewing

buccinator

found in the heart

cardiac muscle

striated and involuntary

cardiac muscle

abnormal formation of fibrous tissue muscles, preventing normal mobility

contracture

the temporary connection formed when the myosin head interacts with the actin, causing muscle contraction

cross-bridge

muscle that forms the shoulder pads: positions the arms in "scare crow" position

deltoid

triangular

deltoid

chief muscle of respiration

diaphragm

dome-shaped muscle the separates the thoracic cavity from the abdominal cavity

diaphragm

connective tissue that surrounds individual muscle fibers

endomysium

connective tissue that surrounds ta whole skeletal muscle

epimysium

small bundle of muscle fibers

fascicles

flat muscle that raises the eyebrows and wrinkles the forehead

frontalis

The Achilles tendon attaches the soleus and this muscle to the heel bone

gastrocnemius

the calf muscle that is used in plantar flexion: also called the toe dancers muscle

gastrocnemius

buttock

gluteus

largest muscle in the body that forms the part of the buttocks: you sit on this muscle

gluteus maximus

includes the bicep femoris

hamstrings

muscle group on the posterior surface of the thigh that flexes the leg at the knee: antagonistic to the quadriceps femoris

hamstrings

an increase in the size of a muscle because of over use

hypertrophy

muscle attachment to the moveable bone

insertion

barbequed ribs

intercostals

muscles responsible for raising and lowering the rib cage during breathing

intercostals

wide

lastissimus

muscle that raises the eyelid

levator palpebrae superioris

a white line that extends from the sternum to the pubic bone: formed by the aponeurosis of the abdominal muscles

linea alba

a chewing muscle that works synergistically wit the temporalis muscle

masseter

large

maximus

thick protein filaments whose "heads" form the cross-bridges when they interact with the thin filaments

myosin

diagonal

oblique

sphincter muscle encircling the eyes " assists in winking, blinking, and squinting

orbicularis oculi

sphincter muscle encircling the mouth: called the kissing muscle

orbicularis oris

muscle attachment to the stationary bone

origin

chest

pectoralis

anterior chest muscle that adducts and flexes the arm across the chest

pectoralis major

large, broad muscle that forms the anterior chest wall: connects the humerus with the clavicle and structures the chest

pectoralis major

connective tissue that surrounds the fascicles or bundles

perimysium

your frowning and pouting muscle: also depresses mandible

platysma

the muscle responsible for most of the movement in a group of muscles: called chief muscle

prime mover

includes the rectus femoris, vastus medialis, vastus lateralis, and vastus intermedius

quadriceps femoris

straight

rectus

series of contractile units that make up each myofibril: extends from Z line to Z line

sarcomere

calcium is stored within this structure in a relaxed muscle

sarcoplasmic reticulum (SR)

striated and voluntary

skeletal

found attached to bones

skeletal muscle

must be supplied by a motor nerve

skeletal muscle

the only type of muscle that in voluntary

skeletal muscle

found in the walls of blood vessels

smooth muscle

found in the walls of organs and viscera

smooth muscle

nonstriated and involuntary

smooth muscle

the only type of muscle that is nonstriated

smooth muscle

located over the shin bone, causes dorsiflexion

soleus

with regard to plantar flexion, works synergistically with the gastroncnemius

soleus

a spasm in this muscle causes torticollis: or wryneck

sternocleidomastoid

attaches to the collar bone, breast bone, and temporal bone

sternocleidomastoid

muscles on either side of the neck that cause flexion of the head, contraction of one of these muscles rotates the head to the opposite side

sternocleidomastoid

helper muscle: works with other muscles to produce the same movement

synergistically

fan-shaped muscle that extends from the temporal bone to the mandible works synergistically with other chewing muscles

temporalis

cordlike structure that attaches that muscle to bone

tendon

round

teres

muscle in the upper back and neck contraction of this muscle tilts the head so that the face looks up at the sky, also shrugs the shoulders

trapezius

works antagonistically to the sternocleidomastoid

trapezius

muscle that lies along the posterior surface of the humerus: it extends the forearm and is used to bear weight in crutch-walking.

triceps braichii

huge

vastus

extends to the corners of the mouth to the cheek bone: called the smiling muscle

zygomaticus