A Cross-Sectional Study of the Normative Data of the Side-To-Side Soleus Hoffmann Reflex from the Calf Muscle in Healthy Individuals in the Lying Down Position.

The goal of this study was to find out from the calf muscle, the normal H-reflex is in a group of healthy adults. This study is conducted for the period of one year in 2020-2021, in the department of Physiology AIIMS Bhopal, 119 adult male healthy volunteers who were asymptomatic from peripheral neuropathy and had a mean age of 30.40±6.78 were evaluated, to compare the normative tibial H reflex to their stature, body mass index, core body temperature, and limb length. The parameters considered were M- Latency, H-Latency, M-Amplitude, H- Amplitude and H/M Ratio in their left and right legs, respectively. A total of 111 participants (93.3%) were in the age group of 40 years or younger, with the mean age (in years) being 30.40±6.78. Only eight (8) participants (6.7%) belonged to the over-40 age group. The average weight (Kg), height (cm), and limb length (cm) were 173.11 cm, 10.48 cm, and 94.28 cm respectively. The mean ±SD latencies of the H reflex were 30.93±4.42 and 31.01±5.21 milliseconds in the right and left legs, respectively. Leg length and H reflex latency had a significant correlation (r = 0.55, p=0.05). There was no discernible correlation between age and the H reflex latency. The right and left H reflex latencies should vary by no more than 1.8 ms to be deemed normal. This research examined tibia H-reflex side-to-side latency variability and amplitude. Neurologic function may be assessed using the H-reflex. Due of its sensitivity to external circumstances, the H-reflex must be elicited carefully. The H-reflex may reveal neuronal function following damage if assessed appropriately.