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M K Morgan

Publications and source records attributed to M K Morgan.

77 records · Page 5Linked to original sources
PubMedDate not supplied

Maximum grip strength in normal subjects from 20 to 64 years of age.

The purposes of this study were to develop normative maximum grip strength (GRIP) data for men and women aged 20 to 64 years, separated into nine five-year age groups, and to develop prediction equations for GRIP using gender, age, height, weight, and hand dominance. A total of 1,182 volunteers (553 men and 629 women) participated in the study. Maximum hand grips were obtained using the Jamar dynamometer with standardized positioning and instructions. The hand to be tested first was chosen randomly. Each hand was then tested alternately. Three trials were performed on each hand. The highest GRIP for each hand was used for analysis. Two-way analyses of variance showed significant differences between the right and left hands and across the age groups for both genders. Follow-up analyses showed that significant decreases occurred between the age groups of 50-54 and 55-59 years in men and between the age groups of 50-54 and 60-64 years in women. The data also indicated that right and left GRIPs were highly correlated with each other (r = 0.93). Gender, height, and weight moderately correlated with both GRIPS (r = 0.52-0.73. Age correlated weakly with both GRIPs (r = -0.17). If either the right or the left GRIP was known, the other GRIP could be predicted easily from the known GRIP, with 87% of variance accounted for. Without the knowledge of the other GRIP, either GRIP could be predicted through gender, height, weight, age, and hand dominance, with 61% to 62% of the explained variance. The norms and prediction equations of GRIP developed in this study for men and women aged 20 to 64 years will help clinicians with decision making regarding grip strength.

Adult↗
PubMedDate not supplied

Ventricular volume in infantile hydrocephalus and its relationship to intracranial pressure and cerebrospinal fluid clearance before and after treatment. A preliminary study.

The present study examines ventricular volume before and after shunting in 16 infants with hydrocephalus and mixed aetiology and relates this parameter to rates of cerebrospinal fluid clearance, intracranial pressure and outcome. Following treatment all patients showed reduction in intracranial pressure and amelioration of the clinical manifestations of hydrocephalus. Nevertheless, 4 patients showed persistence of marked ventriculomegaly, 4 had moderate ventricular enlargement, while 8 showed small or normal ventricles. Although the series was small there appeared to be a clear correlation between persistent ventriculomegaly, poor cerebrospinal fluid clearance and poor outcome despite reduction in intracranial pressure. The question is raised as to whether pressure-determined cerebrospinal fluid drainage provides optimum treatment of hydrocephalus in infants given the particular physical characteristics pertaining to the non-rigid cranium.

Cephalometry↗