Types and Functions of muscles
generally attached to bone
What is skeletal muscle
origin on the maxilla and mandible and inserts into the orbicularis oris
What is the buccinator
Thick muscle that covers shoulder joint, origin on clavicle and scapula, inserts on humerus
What is the deltoid
Adduct, extend, and rotate arm at shoulder, the cuff stabilizes the shoulder joint
What is rotator cuff muscles
As a group they flex muscle at the knee, extend thigh at the hip
What is hamstring?
Found in the walls of the viscera
What is smooth muscle
smiling muscle
What is Zygomaticus
large, flat, trapezoid shaped muscle on back of neck and upper back
What is the trapezius
causes shrugging and medial rotation of shoulders by pulling shoulder blades or scapulae together
What is Trapezius
Adducts and medially rotates thigh muscles. used by horseback riders to stay on horse.
What is adductor group muscles
muscle appears striped
What is striated?
Flat muscle that covers the frontal bone
What is the Frontalis
Forms buttocks, extends and rotates thigh laterally at the hip, muscle for sitting and climbing stairs
What is the Gluteus maximus
Abducts arm as in scarecrow position, flexes, extends, and rotates arm at shoulder
What is Deltoid
Located on anterior thigh, group used to extend leg at the knee
What is quadriceps femoris
found only in the heart
What is the cardiac muscle
sphincter muscle that encircles the eyes
What is Orbicularis oculi
Located on posterior surface of the thigh, flex leg at knee, extends thigh at the hip
What is Hamstrings
Adducts and medially rotates arm across chest flexes and extends arm at shoulder
What is Pectoralis major
Long muscle that crosses obliquely over anterior thigh, allows you to sit cross legged
What is Sartorius
involuntary nonstriated muscle
What is smooth muscle?
sphincter muscle that encircles the mouth
What is orbicularis oris?
adducts and rotates arm medially, behind the back; "swimmers muscle"
What is Latissimus dorsi
Lowers shoulder and moves the arm forward as in pushing a cart
What is Serratus anterior
Flexes and abducts thigh at the hip
What is Tensor fasciae latae