Which deficit is described as inability to express or comprehend emotional prosody due to right-hemisphere involvement?

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Emotional tone of voice, or prosody, is mainly supported by the right hemisphere. When that area is damaged, the person can lose both expressing and understanding emotional prosody, a condition called aprosody. In aprosody, language content can be normal, but the voice sounds flat or monotone and the person has difficulty grasping or conveying emotions from speech, reflecting a disruption in processing nonverbal emotional cues rather than in vocabulary or grammar. This distinguishes it from other conditions: anosognosia is about lack of awareness of one’s own deficits, somatotopagnosia is trouble identifying body parts, and split-brain syndrome involves disconnection effects between the brain hemispheres.