Chapter 4 Primary Words Flashcards
Innervation
Simulation of a muscle by an impulse transmitted by a motot nerve
Neuromuscular
Pertaining to the relationship between a nerve and muscle
Neur/o means nerve, muscul means muscle, ar means pertaining
Contraction
Tightening of a muscle, muscle contracts it becomes shorter and thicker
Relaxation
Occurs when a muscle returns to its orginal form, muscle relaxes it becomes longer and skinnier
Abduction
Movement of a limb away from the midline of the body
Ab means away from, duct means to lead, -ion means action
Adduction
The movement of a limb toward the midline of the body
Ad means toward, duct means to lead, -ion means action
Skeletal Muscles
Attached to the bones of skeleton and makes body motions possible
Smooth Muscles
Located in the walls of internal organs such as the digestive tract, blood vessels, and ducts leading ffrom glands
Myocardial Muscles
Form the muscular walls of the heart
My/o means muscle, cardi means heart, al means pertaining to
Muscle Fibers
Long, slender cells that make uo muscles, each muscle consists of a group of fibers that are bound together by connective tissue
Fascia
Band of connective tissue that envelops, seperares, or binds together muscle or groups of muscles
Myofascial
Pertaining to muscle tissue and fascia
My/o means muscle, fasci means fascia,al means pertaining to
Tendon
Narrow band of nonelastic, dense, fibrous connective tissue that attaches a muscle to a bone
Aponeurosis
Sheet-like fibrous connective tissue resembling a flattened tendon that connects muscles together or to a bone
Flexion
Decreasing the andle between two bones by bending a limb at a joint
Extension
Increasing the angle between two bones or the straightening out of a limb
Hyperextension
Extreme or overextension of a limb or body part beyond its normal limit
Elevation
Act of raising or lifting a body part
Rotation
Circular movement around an axis such as the shoulder joint
Depression
Act of lowering a body part
Circumduction
Circular movement at the far end of a limb
Humerus
Bone of the upper arm, rotates with shoulder joint
Supination
Act of rotating the arm or leg so the palm is facing upward
Bowl of soup
Pronation
Act of rotating the arm or leg so that the palm or sole of the foot is facing downward
Dorsiflexion
Movement that bends the foot upward at the ankle
Plantar Flexion
Movement that bends the foot downward at the ankle
Plantar means pertaining to the sole of the foot
Origin
Where the muscle begins and it is located bearest the midline of the body
Insertion
Where the muscle ends by attaching to a bone or tendon , more movable than the origin
Pectoralis Major
Named for location and Muscles of the trunk
Thick, fan shaped muscle situated on the anterior chest wall
Lateralis
Named for location
Toward the side
Medialis
Named for location
Toward the midline
Oblique
Named for fiber direction
Slanted or at an angle
Rectus
Named for fiber direction
In straight alignment with the vertical axis of the body
Sphincter
Named for fiber direction
Ring like muscle that tightly constricts the opening of a passageway
Transverse
Named for fiber direction
In a crosswire direction
Biceps Brachii
Named for number of divisions and Muscles of the shoulders and arms
Formed from two divisions, flexes the elbow
Bi means two, -ceps means head
Triceps Brachii
Named for number of divisions and Muscles of the shoulders and arms
Is formed from three divisions, extends the elbow
Tri means three, -ceps means head
Gluteus Maximus
Named for size or shape
Largest muscle of the buttock
Deltoid Muscle
Named for size or shape
Located on the shoulder, shaped like an inverted riangle like the greek letter delta
Hamstring Group
Named for strange reasons and Muscles of the legs
Located at the back of the upper leg, consists of three seperate muscles primary functions are knee flexion and hip extension
Biceps femoris, semitendinosus, semimembranosus
Frontalis
Muscles of the head
In the forehead, raises and lowers the eyebrows
Temporalis
Muscles of the head
Musle moves the lower jaw up and back to close the mouth
Masseter
Muscles of the head
One of the strongest muscles, moves the lower jaw up to close when chewing
External Oblique Muscles
Muscles of the trunk
Flex and rotate the vertebral column, and flex the torso and compress the abdomen
Internal Oblique Muscles
Muscles of the trunk
Flex the spine, support the abdominal contents, help us breathe, and rotate the spine
Rectus Abdominis
Muscles of the trunk
Flex the trunk, assists in breathing, and supports the spine
Transverse Abdominis
Muscles of the trunk
Helps flex the trunk, assists in breathing, and supports the spine
Deltoid
Muscles of the shoulders and arms
Forms the muscular cap of the shoulder
Trapezius
Muscles of the shoulders and arms
Muscle moves the head and shoulder blade
Rectus Femoris
Muscles of the legs
Extends the leg at the knee and flexes the thigh at the hip joint