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Biomedical subjects

M Nissan

Publications and source records attributed to M Nissan.

31 records · Page 2Linked to original sources
PubMed1987

Response of peripheral nerve to He-Ne laser: experimental studies.

Low-energy He-Ne laser irradiation (LELI) was found to affect the electric activity and morphology in both intact and severely injured peripheral nerves in rats. Action potential (AP) in the healthy nerve increased by 33% following a single transcutaneous irradiation. Similar irradiation in crushed nerves caused AP to increase significantly over the AP of nonirradiated crushed nerve. Morphological observations revealed that a laser-irradiated injured nerve had diminished scar tissue as compared to an injured but not an irradiated nerve.

Animals↗
PubMed1986

HeNe laser irradiation delivered transcutaneously: its effect on the sciatic nerve of rats.

For our study of the effect of low energy laser irradiation (LELI) on living tissue we used HeNe laser on rats. The exponential absorption was reaffirmed in the living tissues overlying the sciatic nerve. An optimal range of energy between 3.5 and 7 J--associated with energy concentration of 4-10 J/cm2 delivered transcutaneously--was found to cause a significant increase in action potential in the sciatic nerve. The effect lasted for more than 8 months after the irradiation session.

Action Potentials↗
PubMed1986

Electrophysiological effect of HeNe laser on normal and injured sciatic nerve in the rat.

The effect of low energy CW HeNe laser irradiation on normal and dissected nerves in the rat was examined. The methods are described. Results are compared to the laser effect on other living tissues. HeNe irradiation was found to increase significantly the action potentials of the nerves. It was found to be a long-lasting effect, keeping an increase in the nerves action potential for more than eight months after irradiation has been stopped. A possible explanation for the way the irradiation acts on the nerve is suggested.

Action Potentials↗
PubMed1986

Dimensions of human lumbar vertebrae in the sagittal plane.

Geometrical dimensions of the lumbar segments were determined from a series of lateral radiographs. A two-dimensional model of the lumbar vertebra in the sagittal plane is used. The model is based on five landmarks, which enable the determination of twelve geometrical parameters. The sample includes 157 healthy young males, 20-38 years old. Two-dimensional analysis of vertebral body height, depth and intervertebral spacing was performed. In all subjects disc height increases from L1 to L5, while anterior height is always bigger than posterior height, which emphasizes the lordotic shape of the lumbar region. Anthropometrical values are presented and geometrical relations between the lumbar segments are discussed.

Adult↗
PubMed1986

A study of vertebra and disc geometric relations of the human cervical and lumbar spine.

Geometric configuration and dimensions of the human vertebra were investigated using x-ray photographs of 157 normal, healthy men. A simplified model of the vertebra in the midsagittal plane is presented and used as a basis for measurements. Geometric considerations and statistical analysis served for correlating significant measurements of vertebral bodies and intervertebral disks of the human spine.

Adult↗
PubMed1985

Sagittal radiographic measurements of the cervical and lumbar vertebrae in normal adults.

Lateral radiographs of 157 healthy adult males have been measured to obtain geometrical dimensions of cervical and lumbar vertebrae. Measurements were based on five bony landmarks which can be easily defined in radiographs. The measurements enable the determination of 11 dimensions that are used for anthropometric evaluations of the human vertebrae. We found the cervical vertebrae increasing slightly in width from C3 to C7, while the width of the lumbar vertebrae remained almost constant. The width and height of lumbar vertebrae were approximately twice those of the cervical ones.

Adult↗
PubMed1985

Sagittal evaluation of elemental geometrical dimensions of human vertebrae.

Geometrical configuration and dimensions of the human vertebra were investigated using radiographs of 157 normal healthy adult men. Measurements were based on five bony reference points, which can be defined in radiographs. The measurements permit the determination of nine dimensions that can be used for anthropometrical evaluation of the cervical and lumbar vertebrae. A simplified model of the vertebra in the sagittal plane is presented and serves as a basis for the geometrical measurements. In the cervical region, average width exceeded average height of vertebral bodies C3 to C7, while in C2 the average width was smaller than the average height; C7 was the longest and C3 the shortest cervical vertebra. In the lumbar region, average width exceeded average height of the vertebral bodies. Values for width and height did not differ significantly from L1 to L5; L3 was the longest and L5 the shortest lumbar vertebra.

Adult↗
PubMed1984

Foot-ground pressure pattern of standing hemiplegic patients. Major characteristics and patterns of improvement.

The study was designed to examine major weight-bearing characteristics of hemiplegic patients receiving physical therapy and to assess the usefulness of the Foot Print apparatus as an objective, clinical measurement tool of these characteristics. Measurements of the foot-ground pressure pattern of 23 patients were taken two times, three weeks apart. The results confirmed the clinical impression of lesser weight bearing by the patient on the affected leg, especially on the heel of that leg, compared with weight bearing on the contralateral leg. Consequently, stance stability was impaired. The difference between the foot-ground pressure of the two measurements indicated improvement in the stance characteristics of these patients after treatment. The Foot Print apparatus seems to be an objective measurement tool of assistance both to the patient and the physical therapist in execution of a treatment.

Aged↗
PubMedDate not supplied

Segmented force plate (SFP) software package for clinical use.

A gait analysis system is described. It is designed for clinical use as well as research purposes. The system is simple to operate and can be used by non-computer specialist. The design philosophy is straightforward and allows for easy adaptation to other systems. Samples of the output are presented.

Electronic Data Processing↗