Decteased or lost muscle tone in which muscles appear flaccid.
Invagination of the epimysium that divides muscles into bundles
Inability of a muscle to maintain its strength of contraction or tension; may be related to insufficient oxygen, depletion of glycogen, and/or lactic acid buildup
a continuous sheet of areolar connective tissue and adipose tissue between the dermis of the skin and the deep fascia of the muscles. Also called the hypodermis.
Hypertonia characterized by increased muscle tone, increased tendon reflexes, and pathological reflexes (Babinski sign)
The study of muscles
A white fibrous cord of dense regular connective tissue that attaches muscle to bone.
The ability to return to its original shape after contraction oor extension
A sudden, involuntary contraction of large groups of muscles
Invagination of the perimysium separating each individual muscle fiber (cell)
The cutaneous area developed from one embryonic spinal cord segment and receirving most of it's sensory innervation from one spinal nerve. An instrument for incising the skin or cutting thin transplants of skin.
Rhythmic, involuntary, purposeless contraction of opposing muscle groups.
Aneurotransmitter liberated by many peripheral nervous system neurons and some central nervous system neurons. It is excitatory at neuromuscular junctions but inhibitory at some other synapses (for example, it slows heart rate).
the middle primary germ latyer the gives rise to conective tissues, blood and blood vessels, and muscles.
The record or tracing produced by myograph, an apparatus that measures and records the force of muscular contractions.
The abilit of cells or parts of cells to actively generate force to undergo shortening for movements. Muscle fibers (cells) exhibit a high degree of contractility
Increased muscle tone that is expressed as spasticity or ridigity.
The ability of muscle tissue to stretch when it is pulled
Hypertonia characterized by increased muscle tone, but reflexes are not affected.
A sustained, partial contraction of portions of skeletal or smooth muscle in response to activiation of stretch receptors or a basline level of action potentials in the innervating motor neurons.
Region of the sarcolemma of a muscle fiber (cell) that includes acetylcholine (ACh) receptors, which bind ACh released by synaptic end bulbs of somatic motor neurons.
Motor end plate
A motor neuron together with the muscle fibers (cells) it stimulates
Any abnormal condition or dissease of muscle tissue
Abnormal, spontaneous twitch of a skeletal muscle fibers in one motor unit that is visibele at the skin surface; not associated with movement of the affected muscle; present in progressive diseases of motor neurons, for example poliomyelitis.
State of partial contraction of muscles after death due to lack of ATP; myaosin heads (crossbridges) remain attached to actin, thus preventing relaxation.
Fibrous connective tissues around muscles.
A group of muscles innervated by the motor neurons of a single spinal segment. In an ambryo, the portion of a somite that develops into some skeleteal muscles
An excessive enlargement or overgrowth of tissue with cell division.
A network of saccules and tubes surrounding myofibrilis of muscle fiber (cell), comparable to endoplasmic reticulum; functions to reabsorb calcium ions during relaxtion and releae them to cause contraction.
A complex of three units of muscle fiber composed of a transvers tubule and the sarcoplasmic reticulum terminal cisterns on both sides of it