Mid Muscle Exam Flashcards
Origin
Less moveable attachment of a muscle
Insertion
More moveable attachment of a muscle
Agonist
Prime mover, muscle that directly performs a desired movement
Antagonist
Opposes the prime mover, typically lengthens or relaxes
Reciprocal Inhibition
Prevents an antagonist from contracting while the prime mover is contracting
Synergist
Aids the prime mover in performing the same action as the prime mover
Tendon
Anchors muscles to other structures
Ischemia
Decreased blood flow
Atrophy
Loss of muscle due to inadequate nerve innervation, lack of movement
Tonus
Muscle tone
Aponeurosis
Tendinous sheath, broad flat tendon, muscle to bone/skin
Fascia
Band of irregular tissue that lines and supports tissues
Recruitment
Motor unit activation to recruit more units to increase strength
All or None Law
When a muscle fiber receives a stimulus to contract, it will contract completely or not at all.
Proprioceptors
Receive neurotransmitters that enables the body to know where the body parts are in space
Pain Spasm pain cycle
Self-perpetuating cycle of muscle spasms, increased by neural input, and pain
Gate Control Theory
Mechanism where pain can be let through or restricted. Pain in one area can be forgotten in place of pain in another area
Characteristics of Muscle Tissue
- Excitability/Irritability
- Contractility
- Extensibility
- Elasticity
Excitability/Irritability
Ability to respond to stimulous
Contractility
The ability to shorten
Extensibility
The ability to lengthen
Elasticity
The ability to return back to the original length and movement
Isotonic Contractions
Muscle length changes and involves movement
- Eccentric contraction
- Concentric contraction
Isometric Contraction
Muscle contractions when muscle remains the same
Eccentric Contraction
Isotonic Contraction - Muscle Lengthens
- opposes the concentric contractions to oppose the movements and protect the joints