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Biomedical subjects

A Reches

Publications and source records attributed to A Reches.

At least 91 records · Page 5Linked to original sources
PubMed1978

The differential effect of lithium on noradrenaline- and dopamine-sensitive accumulation of cyclic AMP in guinea pig brain.

Lithium (Li) in its narrow therapeutic concentration range was found to inhibit only the noradrenaline- and not the dopamine-sensitive accumulation of cyclic AMP in guinea pig brain. The results suggest a pharmacological distinction between the anti-schizophrenic drugs that inhibit dopamine-sensitive cyclic AMP accumulation and Li, an antimanic agent that inhibits specifically only the noradrenaline-sensitive cyclic AMP accumulation.

Animals↗
PubMed1977

Anaesthesia in the Guillian-Barré syndrome. A case report and recommendations.

A large proportion of patients with the Guillain Barré syndrome show signs of involvement of the autonomic nervous system beside the better known motor and sensory features of this disease. These patients present a substantial anaesthetic risk because of autonomic dysfunction. We present here an illustrative case in which the administration of a low subarachnoid block resulted in cardiac arrest and offer suggestions for the anaesthetic management of such cases.

Aged↗
PubMed1976

Cerebral dominance for consciousness.

In a prospective study we evaluated the relationship of level of consciousness to hemispheric side of lesion following acute cerebrovascular injury. Fifty-seven percent of patients with left hemispheric lesions had initial impairment of consciousness, in contrast to 25% with right-sided damage.

Cerebrovascular Disorders↗
PubMed1976

Internal carotid arterial occlusion simulating extracerebral hematoma: relation to diagnosis of stroke.

In 2 elderly male patients, a progressive neurologic deficit and alteration of consciousness developed following substantial head trauma succeeded by an asymptomatic "lucid" interval. The sequence of events and the associated electroencephalographic, echoencephalographic and cerebrospinal fluid findings strongly suggested the presence of an extracerebral hematoma. The cerebral angiographic study, however, disclosed complete occlusion of the extracranial portion of the internal carotid artery in both patients. This report stresses the diagnostic difficulties sometimes encountered in relation to stroke patients.

Aged↗
PubMed1976

Aseptic cavernous sinus thrombosis after internal carotid arterial occlusion in polycythaemia vera.

Two patients with untreated polycythaemia vera developed intracranial internal carotid arterial occlusion followed by monocular blindness and the characteristic features of ipsilateral cavernous sinus thrombosis. Primary septic source and signs of systemic infection were absent. It is suggested that the predisposing factors in this unusual syndrome were hyperviscosity and venous sludging induced by the basic haematological disorder and progression of the thrombotic process within the internal carotid artery towards its intracavernous portion with occlusion of the ophthalmic artery and of the arterial branches which supply the walls of the sinus.

Adult↗
PubMed1975

Reversible central nervous system dysfunction in folate deficiency.

An epileptic patient on chronic anticonvulsant drug therapy is described, in whom anaemia and neurological abnormalities including progressive dementia, bilateral pyramidal tract signs, incontinence and ataxia developed. Vitamin B12 serum levels and absorption were normal, but serum folic acid levels were low. Both the neurological disturbances and anaemia resolved following oral folic acid administration. This sequence of events in our patient suggests a cause and effect relationship between the folate deficiency and the coexistent, transient neurological syndrome.

Aged↗
PubMed1975

Hemianopic colour blindness.

A man developed cortical blindness after cerebral infarction in the distribution of both posterior cerebral arteries. When he recovered from this condition, he was found to be colour blind in the left visual field, but not in the right. This unusual situation resulted in apparently contradictory performances on hemifield and free-field tasks of colour discrimination, naming, and recognition. The contradictions may be explained by interhemispheric competition between a hemisphere which could discriminate colours and a hemisphere which was colour blind.

Agnosia↗
PubMed1975

Associative visual agnosia without alexia.

A brain-damaged man was unable to appreciate the nature of objects and meaningful nonverbal symbols presented visually, although he could see, draw, describe, and match these stimuli. He had no difficulty understanding visually presented words. Auditory and tactile recognition of both verbal and nonverbal stimuli were normal. Our findings provide evidence that two neuropsychologic mechanisms were responsible for this disorder. One was an interhemispheric visual-verbal disconnection; the other was a specific categorization defect for visual, nonverba, meaningful stimuli. Neither mechanism alone was sufficient; both were necessary.

Agnosia↗
PubMed1975

Chronic subdural hematoma simulating transient cerebral ischemic attacks. Case report.

A patient is presented in whom chronic subdural hematoma simulated transient ischemic attacks. The neurological manifestations were those of recurrent, transient episodes of expressive dysphasia preceded by focal sensory deficit. Various pathophysiological mechanisms which could have caused the unusual clinical picture are briefly considered.

Aphasia↗