Exact(1)
In older men, the decline in circulating testosterone also correlates with changes in the testes, specifically a decline in Leydig cell number (Neaves et al 1984), development of vacuolizations and lipofuscin within the Leydig cells, and decreased Leydig cell secretion of testosterone in response to provocative stimulation with human chorionic gonadotrophin (Harman and Tsitouras 1980).
Similar(59)
This significant effect was not seen when subjects were exposed to more provocative vestibular stimulation.
There is limited but provocative evidence showing that stimulation of vascular proliferation and repair using vascular endothelial growth factor or hepatocyte growth factor can slow the progression of renal damage, stabilize renal function, and protect the renal parenchyma.
Recording was carried out for about 20 min with 3-min hyperventilation and intermittent photic stimulation as provocative techniques.
Five to 10 years after the surgery, each patient was evaluated by physical examination and by determination of plasma calcitonin levels after stimulation with provocative agents.
The provocation proved provocative.
Sleep deprivation and other provocative tests, including photic (light) stimulation and hyperventilation, can be used to accentuate borderline findings.
In JME, there are additional provocative factors, such as photic stimulation, which may be based on a similar mechanism, i.e. an increased functional connectivity between visual systems and the motor system.
He recently published a provocative paper suggesting that music may exert healing and sedative effects partly through a paradoxical stimulation of a growth hormone generally associated with stress rather than healing.
These provocative experiments suggested that administration of exogenous vasopressin to maintain blood pressure in septic shock is complicated by stimulation of receptors with conflicting function.
The idea of using spinal cord stimulation to treat Parkinson's disease, however, is entirely new, Dr. Rezai said, and he called it both "provocative" and "fascinating," though further research was needed on how it would work in practice.
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