Chapter 4 The Muscular System A&P Flashcards
are the long, slender cells that make up muscles
muscle fibers
is a band of connective tissue that envelops, separates, or binds together muscle or groups of muscles
fascia
means pertaining to muscle tissue and fascia
myofascial
is a narrow band of nonelastic, dense, fibrous connective tissue that attaches a muscle to a bone
tendon
is a sheet-like fibrous connective tissue, which resembles a flattened tendon that serves as a fascia to bind muscles together or as a means of connecting muscle to bone
aponeurosis
are attached to the bones of the skeleton and make body motions possible
skeletal muscle
are located in the walls of internal organs such as the digestive tract, blood vessels, and ducts leading from glands
smooth muscle
also known as myocardium, form the muscular walls of the heart
myocardial (cardiac) muscle
what are the characteristics of skeletal muscle
voluntary, striated, and multiple eccentric nuclei
what are the characteristics of smooth muscle
involuntary, non-striated
what are the characteristics of cardiac muscle
involuntary, striated, and one centrally located nucleus
is the stimulation of a muscle by an impulse transmitted by a motor nerve
muscle innervation
means pertaining to the relationship between a nerve and muscle
neuromuscular
refers to working in opposition to each other
antagonistic
is the tightening of a muscle
contraction
occurs when a muscle returns to its original form
relaxation
is the movement of a limb away from the midline
abduction
is the movement of a limb toward the midline
adduction
is the act of raising or lifting a body part
elevation
is the act of lowering a body part
depression
is a circular movement around an axis such as the shoulder joint
rotation
is the circular movement at the far end of a limb
circumduction
means decreasing the angle between two bones by bending a limb at a joint
flexion
means increasing the angle between two bones or the straightening out of a limb
extension
is the extreme or overextension of a limb or body party
hyperextension
turns a body part on its axis
rotator muscle
is the group of muscles and their tendons that hold the head of the humerus securely in place as it rotates within the shoulder
rotator cuff
is the act of rotating the arm or the leg so that the palm of the hand or sole of the foot is turned forward or upward
supination
is the act of rotating the arm or leg so that the palm of the hand or sole of the foot is turned downward or backward
pronation
is the movement that bends the foot upward at the ankle
dorsiflexion
is the movement that bends the foot downward at the ankle
plantar flexion
means pertaining to the sole of the foot
plantar
is where the muscle begins; located nearest the midline of the body or on a less movable part of the skeleton
origin
is where the muscle ends by attaching to a bone or tendon. is more movable attachment, and it is the farthest point from the midline of the body
insertion
muscle helps bend the neck and rotate the head
sternocleidomastoid
muscle inserts at one point of insertion into the mastoid process
mastoid muscle
are the pair of muscles that make flexion and extension of the wrist possible
flexor carpi muscles and extensor carpi muscles
is a thick, fan shaped muscle situated on the anterior chest wall
pectoralis major muscle
means toward the side
lateralis
is a muscle toward the outer side of the leg
vastus lateralis
means toward the midline
medialis
is a muscle toward the midline of the leg
vastus medialis
means slanted or at an angle
oblique
means in a straight alignment with the vertical axis of the body
rectus
is a ring-like muscle that tightly constricts the opening of a passageway
sphincter
means in a crosswise direction
transverse
is the largest muscle of the buttocks
gluteus maximus
located at the back of the upper leg, consists of three muscles
hamstrings group
what three muscles make up the hamstrings
biceps femoris, semitendinosus, and semimembranosus
what is the function of the hamstrings
knee flexion, and hip extension
is in the forehead. raises and lowers eyebrows
frontalis (occipitofrontalis)
muscle moves the lower jaw up and back to close the mouth
temporalis
which is one of the strongest in the body, moves the lower jaw up to close the mouth when chewing
masseter
makes up the bulk of the chest muscles
pectoralis major
muscles flex and rotate the vertebral column, also flex torso and compress the abdomen
external oblique
flex the spine, support the abdominal contents, help breathe, and rotate the spine
internal oblique
helps flex the trunk, assists in breathing, and supports the spine
rectus abdominus
is located on the side of the abdomen. called the core muscle
transverse abdominus
forms the muscular cap of the shoulder
deltoid muscle
muscle moves the head and shoulder blade
trapezius muscle
located in the anterior upper arm, flexes the elbow
biceps brachii
located in the posterior upper arm, extends the elbow
triceps brachii
extends the leg at the knee
rectus femoris
is made up of four muscles
quadriceps femoris
is the calf muscle that flexes the knee and bends the foot downward
gastrocnemius
is a specialist who works under the supervision of a physician to develop, implement, and coordinate exercise programs
exercise physiologist
is a physician who specializes in treating the causes of paralysis and similar muscular disorders in which there is a loss of function
neurologist
is a physician who specializes in physical medicine and rehabilitation with the focus on restoring function
physiatrist
specializes in treating sports-related injuries of the bones, joints, and muscles
sports medicine physician
means a condition causing weakness
debilitating
refers to adhesions forming in the capsule of connective tissue in the shoulder
frozen shoulder
means deterioration or breaking down
degeneration
means the process of becoming worse
deterioration
means coming and going at intervals
intermittent
means limping
claudication
means pertaining to night
nocturnal
are tender areas that most commonly develop where the fascia comes into contact with a muscle
trigger points
pain that originates in one area of the body, but is felt in another
referred pain
means the person has some function below the level of the injury
incomplete injury
means that there is complete loss of sensation and muscle control below the level of the injury
complete injury
is an involuntary response to stimulus
reflex
is characterized by pain on the outer side of the forearm
lateral epicondylitis (tennis elbow)
is characterized by pain on the palm-side of the forearm
medial epicondylitis (golfer’s elbow)