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Both the extensor and flexor muscles are involved in the maintenance of a constant tone while at rest. In skeletal muscles, this helps maintain a normal posture. Resting muscle tone varies along a bell-shaped curve. Low tone is perceived as "lax, flabby, floppy, mushy, dead weight" and high tone is perceived as "tight, light, strong".
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 ...
Hypotonia is a state of low muscle tone [1] (the amount of tension or resistance to stretch in a muscle), often involving reduced muscle strength. Hypotonia is not a specific medical disorder, but a potential manifestation of many different diseases and disorders that affect motor nerve control by the brain or muscle strength.
If muscle tone is assessed with passive muscle lengthening, increased muscle stiffness may affect the feeling of resistance to passive stretch, in addition to neurological resistance to stretch. Other secondary changes such as loss of muscle fibres following acquired muscle weakness are likely to compound the weakness arising from the upper ...
Muscle paresis or paralysis; Fibrillations; Fasciculations – caused by increased receptor concentration on muscles to compensate for lack of innervation. Hypotonia or atonia – Tone is not velocity dependent. Hyporeflexia - Along with deep reflexes even cutaneous reflexes are also decreased or absent.
Often, hyperkinesia is paired with hypotonia, a decrease in muscle tone. [3] Many hyperkinetic disorders are psychological in nature and are typically prominent in childhood. [ 4 ] Depending on the specific type of hyperkinetic movement, there are different treatment options available to minimize the symptoms, including different medical and ...
Spastic cerebral palsy is caused by malformation of or damage to the parts of the brain that control movement. [12] What exactly makes some children susceptible to such brain damage is often unknown but it is believed that cerebral palsy may be the result of causal pathways, or chains of events that cause or increase the likelihood of brain injury. [13]
Spastic diplegia is a form of cerebral palsy (CP) that primarily affects the legs, with possible considerable asymmetry between the two sides. It is a chronic neuromuscular condition of hypertonia and spasticity in the muscles of the lower extremities of the human body, manifested as an especially high and constant "tightness" or "stiffness", [1] [2] usually in the legs, hips and pelvis.