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