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Biomedical subjects

G P Katiyar

Publications and source records attributed to G P Katiyar.

At least 19 recordsLinked to original sources
PubMed1999

A study of transcranial magnetic stimulation in older (>3 years) patients of malnutrition.

Transcranial magnetic stimulation was performed in 40 subjects. Twenty patients in the age group of 3 to 8 years and having different grades of malnutrition were included in the 'study group' whereas 20 normal children having no complaints comprised the 'control group'. The coil of the magnetic stimulator was applied tangentially over the vertex to stimulate the cortex. The motor evoked potential (MEP) was obtained using root stimulation by applying the coil at the cervical and lumbosacral spines. Recordings were made from the abductor pollicis brevis (APB) and extensor digitorum brevis (EDB) muscles of both sides. Cortical threshold, latency and amplitude of motor evoked potential and central conduction time were recorded. Malnourished children showed significantly increased cortical threshold, prolonged cortical latency and central conduction time and reduction in amplitude of MEP. Observed delay in central motor conduction in malnourished children suggests asymptomatic involvement of corticospinal pathways.

Child↗
PubMed1995

Electrophysiological studies in children with paralytic poliomyelitis.

H-reflex latency (H-RL) and H/M ratio were measured in normal children and children with paralytic poliomyelitis of 1-3 years of age. The H-RL was considerably increased in both the involved and uninvolved limbs of the patients, whereas the H/M ratio did not differ. The Mmax value in the involved limb was very low, and therefore, a corrected H/M ratio was calculated for that side only. The corrected H/M ratio was significantly less than the H/M ratio observed in the uninvolved and control limbs. The distal motor latency was also increased in the involved side.

Child, Preschool↗
PubMed1990

Weight and height norms of 5-10 years old children of upper socio-economic status.

One thousand and twenty four school children (574 boys and 450 girls) between the ages of 5-10 years, belonging to upper socio-economic status were cross sectionally studied to establish regional weight and height norms. The boys were heavier till the age of 9 years while the girls were heavier than boys beyond that age. The boys were taller than the girls between 5-9 years and thereafter the girls over took the boys.

Body Height↗
PubMed1980

Sleep cycle studies in babies of undernourished mothers.

Polygraphic sleep cycle studies--comprising simultaneous recording of electroencephalogram (EEG), electrocardiogram (ECG), electro-oculogram (ECOG), phasic body activity and respiration--were performed on 19 term newborn babies born to severely undernourished mothers, and results compared with 19 healthy newborn babies. The sleep cycle in babies of undernourished mothers showed disorganisation during active rapid eye movement (REM) sleep and quiet nonrapid eye movement (NREM) sleep. The sleep disorganisation was more pronounced during quiet NREM sleep when frequent phasic activity and ocular movements were registered, thereby leading to a significant increase in the content of intermediate sleep. Furthermore, the duration of total sleep cycle and its components, active REM and quiet NREM sleep, were significantly shortened.

Electrocardiography↗