Masseter: Origin
zygomatic arc, maxilla
Deltoid: Origin
acromion and spine of scapula
Tricep Brachii: Origin
long head
Sartorius: Origin
anterior superior iliac spine
Gluteus Maximus: Origin
dorsal ilium, sacrum, and coccyx
Gastrocnemius: Origin
medial and lateral condyles of femur
Masseter: Insertion
angle and ramus of mandible
Deltoid: Insertion
deltoid tuberosity of humerus
Tricep Brachii: Insertion
olecranon of ulna
Sartorius: Insertion
into medial aspect of proximal tibia
Gluteus Maximus: Insertion
gluteal tuberosity of femur and iliotubial tract
Gastrocnemius: Insertion
calcaneal tendon
Masseter: Action
moves jaw, elevates mandible
Deltoid: Action
prime mover of arm abduction
Tricep Brachii: Action
powerful forearm extensor
Sartorius: Action
flexes knees, rotates and laterally moves thigh
Gluteus Maximus: Action
complex, powerful thigh extensor
Gastrocnemius: Action
plantar flexes foot
A prime mover or _______ produces a particular type of movement.
agonist
Skeletal muscles are named on the basis of many criteria such as _________________.
origin, insertion, action
True or False: Muscles of facial expression differ from most skeletal muscles because they usually do not insert into a bone.
True
The __________ musculature includes muscles that move the vertebral column and muscles that move the ribs.
trunk
Muscles that act on the ________ cause movement at the hip, knee, and foot joints.
lower limb
This two-headed muscle bulges when the forearm is flexed. It is the most familiar muscle of the anterior humerus. It is the _________.
biceps brachii
These abdominal muscles are responsible for giving me my "six-pack." They also stabilize my pelvis when walking. They are the __________ muscles.
Rectus Abdominus
This lower limb muscle, which attaches to the calcaneus via the calcaneal tendon and plantar flexes the foot when the knee is extended.
Gastrocnemius
The _________ is the largest and most superficial of the gluteal muscles.
Gluteus Maximus
True or False. The biceps femoris is located in the anterior compartment of the thigh.
False - (posterior)
Origin
muscle end attached to immoveable part
Epimysium
connective tissue surrounding bundle of muscle fibers.
Myosin
protein, works with actin to produce muscle movement
Prime Mover
primary muscle in action
Abduction
away from midline
Perimysium
connective tissue that groups muscle fibers into bundles
Synergist
assists prime mover
Rotation
turning on a longitudinal axis
Actin
protein for contraction and relaxation
Antagonist
opposite actions from prime mover
Insertion
end of muscle attached to an immoveable part
Ligaments
Stabilizes bone
Supination
movement of the palm posteriorly
Extension
increases angle of body parts
Inversion
sole of the foot inwards
Adduction
toward midline
Tendon
connective tissue that attaches muscle to bone
Flexion
brings the insertion toward origin
Circumduction
movement in a circular motion (involves limbs)
Pronation
movement of the palm anteriorly