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Hyperreflexiais overactive or overresponsive bodilyreflexes.Examples of this includetwitchingandspastictendencies, which indicatedisease of the upper motor neuronsand the lessening or loss of control ordinarily exerted by higherbraincenters of lower neural pathways.[citation needed]
| Hyperreflexia | |
|---|---|
| Other names | Hyper-reflexia |
| Specialty | Neurology |
Spinal cord injuryis the most common cause of hyperreflexia.[citation needed]Standard stimuli, such as the filling of the bladder, can cause excessive responses from the nervous system. The causes of hyperreflexia are not known.[citation needed]
Hyperreflexia also has many other causes, including the side effects ofdrugs(e.g.,stimulants),hyperthyroidism,electrolyte imbalance,serotonin syndrome,severebrain trauma,multiple sclerosis,Reye syndrome,andpre-eclampsia.[citation needed]
Recovery from hyperreflexia can occur several hours to several months after aspinal cord injury;the phase of recovery is likely to occur in stages rather than on a continuum.[1]The late stage is between two weeks and several months.[1]Patients with a severe spinal cord injury mainly present with a later stage of recovery because during the early stages they present withspinal shock.[1]Reflex and motor recovery can sometimes occur simultaneously.[1]