Heffner H E, Heffner R S
Laboratory of Comparative Hearing, Bureau of Child Research, University of Kansas.
Behav Neurosci. 1989 Feb;103(1):158-69. doi: 10.1037//0735-7044.103.1.158.
The effect of small bilateral cortical lesions on pure-tone audiograms and on the ability to discriminate between two types of Japanese macaque coo vocalizations was determined in four Japanese macaques (Macaca fuscata). A lesion that included the middle portion of the superior temporal gyrus of both hemispheres, that is, the primary and secondary auditory areas, resulted in a partial hearing loss as well as an inability to discriminate the vocalizations. Lesions that included the ventral portions of the superior temporal gyrus of both hemispheres but spared auditory cortex on one side also resulted in a partial hearing loss but had either a small effect or no effect on the ability to discriminate the vocalizations. Bilateral ablation of the dorsal superior temporal gyrus and adjacent parietal and occipital areas did not appear to result in a hearing loss and had no effect on the ability to discriminate the vocalizations. These results suggest that a hearing loss may be produced by lesions that involve small portions of the ventral two-thirds of the superior temporal gyrus bilaterally although the resulting loss is not as great as that observed with larger lesions. However, the aphasia-like deficit appears to result from a lesion of primary and/or secondary auditory cortex.
在四只日本猕猴（食蟹猴）身上，确定了双侧小面积皮质损伤对纯音听力图以及区分两种日本猕猴咕咕叫声能力的影响。双侧包括颞上回中部（即初级和次级听觉区域）的损伤，导致部分听力丧失以及无法区分叫声。双侧包括颞上回腹侧部分但一侧听觉皮质未受损伤的损伤，也导致部分听力丧失，但对区分叫声的能力影响较小或无影响。双侧切除背侧颞上回及相邻的顶叶和枕叶区域似乎并未导致听力丧失，对区分叫声的能力也无影响。这些结果表明，双侧颞上回腹侧三分之二的小部分损伤可能会导致听力丧失，尽管由此产生的听力损失不如较大损伤时那么严重。然而，类似失语症的缺陷似乎是由初级和/或次级听觉皮质的损伤引起的。
