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In physiology, medicine, and anatomy, muscle tone (residual muscle tension or tonus) is the continuous and passive partial contraction of the muscles, or the muscle's resistance to passive stretch during resting state. [1] [2] It helps to maintain posture and declines during REM sleep. [3]
Tonus is the Latin equivalent of the English word tone, and may refer to: Muscle tone, the continuous and passive partial contraction of the muscles; Arterial tone, the continuous and passive partial contraction of the arterioles; Tonicity, the ability of a solution to cause water movement; The Pythagorean interval of 9/8
Myogenic tone is a state of muscle tone in living creatures that originates from the muscle itself rather than from the autonomic nervous system or from hormone processes. It may be contrasted with neurogenic tone , which is created by actions of the autonomic nervous system.
Other secondary changes such as loss of muscle fibres following acquired muscle weakness are likely to compound the weakness arising from the upper motor neuron lesion. In severely affected spastic muscles, there may be marked secondary changes, such as muscle contracture, particularly if management has been delayed or absent. [citation needed]
Spastic hypertonia involves uncontrollable muscle spasms, stiffening or straightening out of muscles, shock-like contractions of all or part of a group of muscles, and abnormal muscle tone. It is seen in disorders such as cerebral palsy, stroke, and spinal cord injury. Rigidity is a severe state of hypertonia where muscle resistance occurs ...
Tone (linguistics), the pitch and pitch changes in words of certain languages; Tone (musical instrument), the audible characteristics of a musician's sound; Musical tone, a sound characterized by its duration, pitch, intensity, and timbre; Pure tone, a tone with a sinusoidal waveform; Reciting tone, such as Psalm tone and recitative, as in ...
Exercises can aid fat loss or stimulate muscle hypertrophy, but cannot otherwise improve tone. [1] The size of the muscle can change, as can the amount of fat covering the muscle, but the 'shape' cannot. The words "tone" and "toning" can be misleading as they suggest that spot reduction is possible, which it is not. More accurate descriptions ...
Cardiac muscle is a striated muscle that makes up the heart. It is the only type of muscle consisting of branching fibers. It is the only type of muscle consisting of branching fibers. Skeletal muscle consists of voluntary muscles attached to the frame of the skeletal system enabling bodily movement.