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Mutism and cerebellar dysarthria after brain stem surgery: case report
1Cerebrovascular Surgery, Massachusetts General Hospital, Boston, USA.
Neurosurgery
|April 1, 1995
Summary
Post-surgery mutism in children can resolve to cerebellar speech. This case highlights pontine surgery as a potential cause, implicating specific brain regions in speech production.
Area of Science:
- Neuroscience
- Neurology
- Neurosurgery
Background:
- Transient mutism and subsequent cerebellar speech are known post-surgical complications, typically after posterior fossa procedures.
- The precise anatomical underpinnings of these speech changes remain incompletely understood.
- Previous hypotheses have implicated the superior cerebellar hemisphere or medial deep cerebellar nuclei.
Observation:
- An 8-year-old girl underwent resection of a pontine cavernous malformation via a subtemporal approach.
- Postoperatively, she experienced profound mutism, followed by a prolonged period of cerebellar dysarthria.
- This represents the first documented instance of mutism evolving into cerebellar dysarthria following a supratentorial approach to brainstem surgery.
Findings:
- The case suggests that pontine tegmental injury can contribute to postoperative mutism and dysarthria.
- The findings support the involvement of superior cerebellar hemispheres, deep cerebellar nuclei, and their outflow pathways in speech production.
- This expands the understanding of the neural circuitry underlying human speech.
Implications:
- The study broadens the anatomical considerations for postoperative speech deficits.
- It underscores the complex relationship between brainstem structures, cerebellar pathways, and vocalization.
- Further research into the neuroanatomy of speech is warranted.