Chapter 7: Vocab Flashcards
Contractility
Allows muscles to change shape to become shorter and thicker
Extensibility
Living muscles cells can be stretched and extended, becoming longer and thinner
Excitability
Muscles receive and respond to stimulation
Elasticity
Once a stretching force is removed, a living muscle cell returns to its original shape
Origin (muscle)
The more fixed attachment of the muscle to the stationary bone
Insertion (muscle)
Point of attachment if a muscle to the bone that it moves
Antagonist
Muscle that counteracts the action of another muscle; when one contracts, the other relaxes
Prime mover/agonist
Muscle that is primary in a given movement; the movement is produced by its contraction
Synergist
Muscle that acts with another muscle to produce and assist movement
Skeletal muscles
Aka striated or voluntary
Smooth muscle
Involuntary , unstriated, visceral
Not controlled by the conscious part of the brain
Cardiac muscle
Involuntary, striated; Muscle of the heart, cardiac muscle (myocardium). Under control of autonomic nervous system
Aponeurosis
A strong, flat sheet (tendon) of fibrous connective tissue that serves as a tendon to attach muscles to bone or as fascia to bend muscles together or to other tissues at their origin or insertion
Ataxia
Lack of muscular coordination, an inability to coordinate voluntary muscular movements that is symptomatic of some nervous disorders
Atonic
Pertaining to a lack of normal tone or tension; the lack of normal muscle tone
Atrophy
Literally means ‘a lack of nourishment’; wasting away if muscular tissue that may be caused by lack of use or lack of nerve stimulation of the muscle.
Biceps
Muscle with two heads or points of origin
Brachialgia
Pain in the arm
Bradykinesia
Slowness of motion or movement
Clonic
Pertaining to alternate contraction and relaxation of muscles
Contraction
Process of drawing up and thickening of a muscle fiber
Contracture
Condition in which a muscle shortens and renders the muscle resistant to the normal stretching process
Dactylospasm
Medical term for cramp of a finger or toe
Dermatomyositis
Acute or chronic disease with systemic pathology; inflammation of the muscles and the skin; a connective tissue disease characterized by edema, dermatitis, and inflammation of the muscles. Occurs in children and adults, and in the latter may be associated with neoplastic disease (cancer) or other disorders of connective tissue.