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Results for “REFLEX, POSTURAL”

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At least 1,315 records · Page 73Linked to original sources
PubMed1981

Relationship between development of the body-righting reaction and manual midline crossing behavior in the learning disabled.

The study was designed to consider the possible relationship between the development and integration of the body-righting reaction and the development of manual midline crossing behavior in learning-disabled and normal children aged 6 to 8 years (23 subjects in each group). A combination of three movement patterns (rolling from supine to prone, transition from supine to standing, and equilibrium in sitting) was used to analyze the body-righting reaction. The Space Visualization Contralateral Use (SVCU) score derived from the Southern California Space Visualization Test was used to measure manual midline crossing behavior. Results of the study found that the learning-disabled subjects exhibited significantly reduced performance on both test measures, when compared to the normal controls. A correlation between scores on the two tests did not reach significance. The findings are described as they relate to sensory integration testing, and the need for further study of the body-righting reaction and manual midline crossing behavior.

Child↗
PubMed1989

Current concepts of the vestibular system reviewed: 2. Visual/vestibular interaction and spatial orientation.

The vestibular system contributes to the generation of conjugate eye movements, spatial orientation, and postural control. The functional connections of the vestibular end-organs and of the descending vestibulospinal pathways and their importance to postural control were reviewed in the previous paper by Keshner and Cohen (pp. 320-330). This paper reviews the ascending vestibular pathways, the visual/vestibular interactions, and the role of the vestibular system in oculomotor control and spatial orientation.

Eye Movements↗
PubMed1975

Norepinephrine depletion in idiopathic orthostatic hypotension.

Five patients with idiopathic orthostatic hypotension and defective vasoconstrictor responses to the Valsalva maneuver and to application of ice to the forehead were found to have absent vasoconstriction in the forearm in response to intra-arterial administration of tyramine and enhanced vasoconstrictor responses in response to intra-arterial administration of norepinephrine. These findings strongly suggested norepinephrine depletion from the nerve endings and inability of the sympathetic nerve endings to take up norepinephrine. The depletion of norepinephrine from sympathetic nerve endings was confirmed in four patients by demonstrating histochemically the absence of catecholamine-specific fluorescence in sympathetic vasomotor nerves from deltoid muscle. It is suggested that depletion of norepinephrine from nerve endings was responsible for autonomic dysfunction and orthostatic hypotension in these patients.

Fluorescence↗
PubMed1999

Subjective visual vertical in patients with benign paroxysmal positional vertigo.

The ocular tilt reaction leads to an alteration in the subjective visual vertical (SVV). Nonsurgical peripheral vestibular dysfunction only rarely leads to changes in the SVV. To our knowledge, no studies have examined the effects on the SVV in patients with benign positional paroxysmal vertigo (BPPV) post Hallpike and Semont maneuvers. Sixteen patients with posterior canal BPPV were assessed in the vestibular clinic in Winnipeg, Manitoba. These patients had assessment of their SVV at baseline, post Hallpike and Semont maneuvers, and at follow-up 2 weeks later. These patients were also compared to a control group (n = 9). Ten of 16 patients showed a statistically significant change in SVV post Hallpike maneuver. An even larger number of patients, 14 of 16, showed a significant difference when compared to the control group post Hallpike. These findings suggest that the inferior vestibular nerve may to some degree influence the ocular tilt reaction.

Adult↗
PubMedDate not supplied

[The use of chronic epidural electrostimulation of the spinal cord in children with spastic diplegia--a type of infantile cerebral palsy].

The authors' first experience with spinal cord stimulation (SCS) at the lumbar level in the treatment of cerebral palsies (CP) in children aged 3-11 years who had lower spastic paraparesis of varying severity is presented. Complex clinical and physiological studies of all 9 children were made before and after surgery (follow-ups lasting 6-12 months). Preliminary results have indicated that the most significant changes occur primarily in pathological postural tonic reflexes. SCS has virtually no effect on fixed limb deformities, which requires further orthopedic surgical correction. A medical care schedule for CP children affected predominantly with lower spastic paraparesis should include, among its first priorities, electrode implantation for SCS. Due to the specific rehabilitative dynamics of motor functions, SCS should be made to treat these children before the deformities in the lower extremity joints get fixed.

Adolescent↗
PubMedDate not supplied

[Diseases caused by repetitive trauma of the upper limbs: epidemiology, diagnosis, prevention. Epidemiological aspects].

The association between occupational risk factors and musculo-skeletal disorders due to biomechanical overload (WMSDs) has been focused on numerous research projects, ranging from those simple observing the different pathological findings reported among workers performing particular tasks, down to the latest studies actually quantifying the exposure of workers to basic risk factors, as force, awkward posture, repetition and to modifying factors as duration, intensity, temporal profile and cold temperatures. The critical review of the epidemiological studies, taking into account their quality, showed a clear relationship between basic and modifying risk factors and upper limb pathologies. In particular, force exertion has been shown strongly related to neck, elbow and hand-wrist pathologies; repetition showed some convincing evidence of causal relationship to neck, shoulder and hand-wrist pathologies. Insufficient evidence of work relatedness has been shown between both repetition and awkward posture and elbow pathologies.

Animals↗
PubMed2001

Changes in conditioned postural responses. Comparison between cerebellar patients and healthy subjects.

Postural responses elicited by external perturbation change characteristically during classical conditioning. This is assumed to be controlled by the cerebellum. In this study conditioning of postural responses in cerebellar patients was compared with that of healthy subjects. Subjects were tested when standing on a platform. Perturbations consisted of platform tilts (unconditioned stimulus, US), preceded by an auditory signal (conditioned stimulus, CS). The recording session consisted of US-alone and paired CS-US trials. In healthy subjects, unconditioned response (UR) amplitude decayed significantly with time in the recording session, especially strongly during paired trials. Amplitudes of cerebellar patients, however, decayed modestly and continuously, independently of the presence (paired trials) or otherwise of a CS. In addition, only healthy subjects established conditioned responses. Our data suggest that the prior auditory information is used to prepare postural responses. Deficits in cerebellar patients suggest a possible role of the cerebellum in controlling this plastic motor-related process.

Acoustic Stimulation↗
PubMed2002

[Dopa-responsive dystonia--a hereditary dystonia easy to treat].

BACKGROUND: Dopa-responsive dystonia is a genetically determined disorder with early onset. The dystonia usually manifests as a disturbance of gait with fatigue and may be confused with spasticity. The diagnosis is based on clinical recognition and response to l-dopa, which is usually complete and long lasting. The most common genetic defect involves the gene for GTP cyclohydroxylase I. MATERIAL AND METHODS: We describe a Norwegian family in which three generations are affected. RESULTS: All those affected had gait disturbance from childhood; the disturbance became worse during the day and after exercise. Clinical examination revealed reduced fine motor skills and brisk tendon reflexes. Dystonic posturing of one or both legs could be seen during walking. All patients were treated with l-dopa with excellent effect. INTERPRETATION: Though uncommon, this disorder is an important differential diagnosis in children with gait disturbance, particularly in those suspected as having spastic paraparesis.

Adolescent↗
PubMed1991

Severe Medical and Neurologic Complications Associated with Near-Lethal Catatonia Treated with Electroconvulsive Therapy.

In a patient with near-lethal catatonia, complications progressed from mild fever and tachycardia to severe hyperthermia, malignant hypertension, and cortical and subcortical dysfunction with increased urine cortisol and catecholamine concentrations, bilateral extensor toe reflexes, decerebrate posturing, and Cheyne-Stokes respirations. Electroconvulsive treatment reversed these changes and prevented almost certain death.

Journal Article↗