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J Neuropsychiatry Clin Neurosci. 1996 Fall;8(4):417-22.

Effect of photic stimulation on energy metabolism in the human brain measured by 31P-MR spectroscopy.

Author information

1
Department of Psychiatry, Shiga University of Medical Science, Japan.

Abstract

Effect of photic stimulation (PS) on energy metabolism in the human occipital cortex was examined by using phosphorus-31 magnetic resonance spectroscopy in 9 normal subjects. Phosphocreatine (PCr)/total phosphorus signal peak area ratio significantly decreased from 12.3% to 10.9% during the 12 minutes of PS (P < 0.05). PCr once returned to a normal level after PS (11.9%) but significantly decreased again 12-18 minutes after PS (10.8%; P < 0.05). Intracellular pH increased from 7.08 to 7.16 during PS, although this increase was not significant. These results suggest that functional alteration of energy metabolism in the brain is different from that in muscles.

PMID:
9116478
DOI:
10.1176/jnp.8.4.417
[Indexed for MEDLINE]

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