Pell M D
School of Communication Sciences and Disorders, McGill University, Montreal, Quebec, Canada.
Neuropsychologia. 1998 Aug;36(8):701-15. doi: 10.1016/s0028-3932(98)00008-6.
The perception of prosodic distinctions by adults with unilateral right- (RHD) and left-hemisphere (LHD) damage and subjects without brain injury was assessed through six tasks that varied both functional (i.e. linguistic/emotional) and structural (i.e. acoustic) attributes of a common set of base stimuli. Three tasks explored the subjects' ability to perceive local prosodic markers associated with emphatic stress (Focus Perception condition) and three tasks examined the comprehension of emotional-prosodic meanings by the same listeners (Emotion Perception condition). Within each condition, an initial task measured the subjects' ability to recognize each "type" of prosody when all potential acoustic features (but no semantic features) signalled the target response (Baseline). Two additional tasks investigated the extent to which each group's performance on the Baseline task was influenced by duration (D-Neutral) or fundamental frequency (F-Neutral) parameters of the stimuli within each condition. Results revealed that both RHD and LHD patients were impaired, relative to healthy control subjects, in interpreting the emotional meaning of prosodic contours, but that only LHD patients displayed subnormal capacity to perceive linguistic (emphatic) specifications via prosodic cues. The performance of the RHD and LHD patients was also selectively disturbed when certain acoustic properties of the stimuli were manipulated, suggesting that both functional and structural attributes of prosodic patterns may be determinants of prosody lateralization.
通过六项任务评估了单侧右脑损伤（RHD）和左脑损伤（LHD）的成年人以及无脑部损伤的受试者对韵律差异的感知，这些任务改变了一组常见基础刺激的功能（即语言/情感）和结构（即声学）属性。三项任务探究了受试者感知与强调重音相关的局部韵律标记的能力（焦点感知条件），另外三项任务考察了相同听众对情感韵律意义的理解（情感感知条件）。在每个条件下，一项初始任务测量了受试者在所有潜在声学特征（但无语义特征）都指示目标反应时识别每种“类型”韵律的能力（基线）。另外两项任务研究了在每个条件下，每组在基线任务上的表现受刺激的时长（D-中性）或基频（F-中性）参数影响的程度。结果显示，相对于健康对照受试者，RHD和LHD患者在解读韵律轮廓的情感意义方面均受损，但只有LHD患者通过韵律线索感知语言（强调）特征的能力低于正常水平。当刺激的某些声学属性被操纵时，RHD和LHD患者的表现也受到了选择性干扰，这表明韵律模式的功能和结构属性可能都是韵律侧化的决定因素。
