TO STUDY THE ABNORMAL MUSCLE CONTRACTION DUE TO LOWER MOTOR NEURON LESION WITH THE HELP OF STRENGTH DURATION CURVE: A PILOT STUDY

Abstract

The symptoms that arise from damage to the lower motor neurons of the brainstem and spinal cordare referred to as the “lower motor neuron syndrome.” Damage to lower motor neuron cell bodies or their peripheral axons results in paralysis (loss of movement) or paresis (weakness) of the affected muscles. In addition to paralysis and/or paresis, the lower motor neuron syndrome includes a loss of reflexes (areflexia) due to interruption of the efferent (motor) limb of the sensory motor reflex arcs. Aim was to study the abnormal muscle contraction due to LMN (lower motor neuron) lesion with the help of SD curve patient suffering from Neurapraxia. Objectives was to find Rheobase and Chronaxie values in non-effected side and compare it with effected side of the Patient and identification of kink (if present) in the graph of effected side. A longitudinal study was done on 6 subjects suffering from nerve compression. Sample was collected from bilateral limb Rheobase and Chronaxie were measured at the regions of the Quadriceps, Tibialis Anterior and Deltoid muscle. Subject gone through diagnostic Electrical Stimulation (galvanic current) which produce square wave of various pulse duration ranging from 0.01 to 300 msec. Electrical stimulation used was of constant current type. Result were obtained by applying standard deviation and T test, there is a significant change in the value of Chronaxie in the effected side. P value obtained (p ≤ 0.04). Presence of kink in the SD curve shows the reaction of degeneration in the effected side of the patients. Study showed that the patients suffer from disproportionate muscle excitation and contraction ability. Damage to lower motor neurons also entails a loss of muscle tone, since tone. The muscles involved may also exhibit fibrillations and fasciculation, which are spontaneous twitches characteristic of single denervated muscle fibers or motor units, respectively. Anil Kumar, Seema Singh, Ashok Kumar Sharma Department of Physiology, Department of Physiotherapy Era's Lucknow Medical College & Hospital, Sarfarazganj Lucknow, U.P., India-226003 ERA’S JOURNAL OF MEDICAL RESEARCH TO STUDY THE ABNORMAL MUSCLE CONTRACTION DUE TO LOWER MOTOR NEURON LESION WITH THE HELP OF STRENGTH DURATION CURVE: A PILOT STUDY VOL.6 NO.1 Original Article Page: 49 ERA’S JOURNAL OF MEDICAL RESEARCH, VOL.6 NO.1 Dr. Seema Singh Department of Physiology Era’s Lucknow Medical College & Hospital, Lucknow-226003 Email: singh_seema2007@yahoo.com Contact no:+91-9451993425 Address for correspondence Received on : 08-10-2018 Accepted on : 27-06-2019