Motor aphantasia is the inability to mentally rehearse physical movement. It shows up most in activities that lean on imagined practice, like sports or dance.
Peruski · Journal of Neurophysiology
Aphantasics showed reduced right-brain activation and increased left middle frontal gyrus activity during motor imagery. This suggests they use compensatory semantic strategies, indicating mental imagery is not essential for motor cognition.
Nanay · Trends in Cognitive Sciences
Aphantasia is a heterogeneous condition with distinct subtypes, including variations in voluntary control and sensory modalities. Recognizing these differences is essential for developing accurate experimental methodologies and explanations.
Kwaśniak and colleagues · Scientific Reports
People with aphantasia showed reduced activation in the right middle frontal gyrus and right motor cortex during motor imagery tasks. This suggests that aphantasia involves differences in attentional switching and neural processing beyond just visual imagery.
Zeman · Neuropsychologia
Ten years after aphantasia was named, Adam Zeman argues it likely has several subtypes and that most abilities are spared, with memory for one's own past differing most. He urges an open mind in this young field.
Monzel and colleagues · Cortex
Researchers propose defining aphantasia as the absence or reduction of voluntary sensory imagery across any modality. This unified terminology avoids a proliferation of new terms while acknowledging that imagery deficits can be specific or multisensory.