Lesson 6 Flashcards
motor unit
a motor nerve plus all the muscle fibers it stimulates
isotonic
muscle contracts and shortens
insertion
part of a muscle that is attached to a movable part
intramuscular
into the muscle
irritability
ability to react to a stimulus, excitability
isometric
muscle tension increases, but muscle does not shorten
belly
the central part of a muscle
biceps
muscle on front part of upper arm
blepharospasm
involuntary muscle contraction of the eyelid, causing blinking
contractility
the capacity of a muscle to shorten in response to a stimulus
dilator muscle
a muscle that opens or closes an orifice
elasticity
capable of returning to original form after being compressed or stretched
excitability
ability to respond to stimuli
fibromyalgia
chronic muscle pain
heel spur
a calcium deposit in the plantar fascia, near its attachment to the calcaneus bone
hernia
protrusion of part of an organ through abnormal opening
acetylcholine
chemical released when a nerve impulse is transmitted
antagonist
a muscle whose action opposes the action of another muscle
triceps
three headed muscle on the back of the upper arm
muscle fatigue
caused by an accumulation of lactic acid in the muscle
muscle spasm
sustained muscle contraction
muscle strain
over tearing or stretching of the muscle
muscle tone
muscles always in a state of partial contraction
muscular dystrophy
muscle disease in which the muscle cells deteriorate
myalgia
muscular pain
origin
part of the skeletal muscle that is attached to the fixed part of the bone
plantar fasciitis
inflammation of the plantar fascia on the sole of the foot
prime mover
muscle that provides movement in a single direction
rehabilitation
the process of restoring function through therapeutic exercise
remission
a long term disappearance of symptoms of a disease
sarcolemma
muscle cell membrane
sarcoplasm
the hyaline or finely granular interfibrillar material of muscle tissue
shin splints
injury to the muscle tendons in front of the skin
smooth muscle
non striated, involuntary muscle
sphincter muscle
circular muscle such as the anus
strain
tear in a muscle
strength
capacity to do work
synergists
muscles that help steady a joint
tennis elbow
inflammation of the tendon that connects the arm muscles to the elbow
action potential
the electric exchange occurring across the membrane of a nerve or muscle cell during transmission of a nerve impulse
all or none law
law that states a muscle cell, when stimulated, contracts all the way or not at all
dystonia
characterized by involuntary muscle contractions tat cause repetitive movements or abnormal posture
extensibility
the ability to lengthen (stretch) and hence increase the distance between two parts
myasthenia gravis
disease in which there is abnormal weakness and eventual paralysis of muscles
neuromuscular junction
point between the motor nerve axon and the muscle cell membrane
physiotherapy
treatment of disease and injury by physical means using light, heat, cold, water, electricity, massage, and exercise
rotator cuff injury
an inflammation of a group of tendons that fuse together and surround a shoulder joint
tetanus
infectious disease, usually fatal, characterized by spasm of voluntary muscles and convulsions caused by a toxin from tetanus bacillus
torticollis
a contracted state of the neck muscles that produces an unnatural position of the head; also called wryneck
vastus lateralis
muscle found on anterior of thigh, used as an injection site for intramuscular injections
dilator muscles
a muscle that opens or closes an orifice
action potentials
the electric change occurring across the membrane of a nerve or muscle cell during transmission of a nerve impulse
