The Cerebellar Cognitive Affective/Schmahmann Syndrome: a Task Force Paper

Area of Science:

• Neuroscience
• Cognitive Science
• Clinical Neurology

Background:

• The cerebellum's role in cognition and affect, once debated, is now well-established.
• Cerebellar Cognitive Affective Syndrome (CCAS), or Schmahmann syndrome, describes cerebellar-induced deficits in executive function, visuospatial skills, emotion, and language.

Purpose of the Study:

• To stimulate further research into the cerebellum's cognitive and affective functions.
• To provide an overview of cerebellar neurocognition and the clinical evidence for CCAS.
• To examine current understanding of CCAS and potential therapeutic interventions.

Main Methods:

• Review of fundamental findings in cerebellar neurocognition.
• Synthesis of recent evidence supporting the CCAS concept from various scientific disciplines.
• Examination of therapeutic options and identification of research gaps.

Main Results:

• The cerebellum significantly modulates cognitive and affective processes.
• CCAS is a recognized clinical entity encompassing a range of neurocognitive deficits.
• Evidence from multiple angles substantiates the cerebellum's role in higher-order functions.

Conclusions:

• Further research is crucial to fully elucidate the cerebellum's functional topography and mechanisms in cognition and affect.
• Increased awareness of CCAS as a clinical syndrome is needed.
• Outstanding questions remain regarding the precise neural pathways and therapeutic strategies for CCAS.