Brainstem and cerebellar variations in cheetahs (Acinonyx jubatus)

The cheetah is a species known for its high-speed hunting, requiring sophisticated visuomotor and vestibulomotor skills. A recent study showed cheetahs have enlarged semicircular canals, suggesting enhanced vestibular information processing. We asked if the semicircular canal specializations might be reflected in the brainstem targets of vestibular input and in related cerebellar structures....

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No actionable change for human audiology practice; this is a comparative neuroanatomy study in cheetahs relevant to evolutionary vestibular research, not clinical hearing care.

Identifying enlarged semicircular canals in cheetahs as an adaptation for high-speed stability advances comparative vestibulomotor research and may inspire biomechanical models of balance and gaze control.

1. 01Cheetah brainstems and cerebella show distinctive anatomical variations compared to other felids.
2. 02Semicircular canals (inner-ear balance organs) are enlarged in cheetahs relative to other big cats.
3. 03Enlarged canals are hypothesized to enhance vestibulo-ocular reflex (gaze stabilization) during high-speed chases.
4. 04Findings support a link between inner-ear anatomy and sophisticated vestibulomotor (balance and movement) skills.
5. 05Published in Anatomical Record, 2026.

PMID

42618520

DOI

10.1002/ar.70324.

Journal

Anatomical Record

Publication type

research_article

Evidence level

4

Population

Cheetahs (Acinonyx jubatus) examined for brainstem and cerebellar neuroanatomy

Intervention

Morphological and anatomical analysis of brainstem, cerebellum, and semicircular canals