Coffey C E, Bryden M P, Schroering E S, Wilson W H, Mathew R J
Department of Psychiatry, Duke University Medical Center, Durham, North Carolina 27710.
J Neuropsychiatry Clin Neurosci. 1989 Winter;1(1):46-52. doi: 10.1176/jnp.1.1.46.
This investigation was designed to test the hypothesis that ear advantage on a dichotic listening (DL) task of pitch discrimination reflects asymmetries in the metabolic activities of the temporal lobes. Fourteen normal subjects, with either a left-ear advantage (LEA) (n = 9) or a right-ear advantage (REA) (n = 5) on the DL task, underwent measurements of regional cerebral blood flow (rCBF) during a resting baseline condition and during performance on the DL task. For both groups, the DL task was associated with selective and significant increases in rCBF to the contralateral posterior temporal lobe. Our finding of selective rCBF activation with dichotic stimulation may have potential implications for an understanding of the functional organization of the cerebral hemispheres.
在双耳分听（DL）音高辨别任务中出现的耳优势反映了颞叶代谢活动的不对称性。14名在DL任务中表现出左耳优势（LEA）（n = 9）或右耳优势（REA）（n = 5）的正常受试者，在静息基线状态和执行DL任务期间接受了局部脑血流（rCBF）测量。对于两组受试者，DL任务均与对侧后颞叶rCBF的选择性显著增加相关。我们关于双耳刺激时rCBF选择性激活的发现可能对理解大脑半球的功能组织具有潜在意义。
