Exam questionKROK 1Medicine ยท 2008
In course of an experiment a toad's right labyrinth was destroyed. It will cause amyotonia of the following muscles:
Answer options
- Right flexors
- Right extensors
- Left flexors
- Left extensors
- Right and left extensors
Correct answer
Right extensors
Explanation
Vestibular nuclei receive impulses concerned with muscle tone and posture from the vestibular apparatus and the cerebellum. The extensor muscles are also for balance (connected with the vestibular apparatus). By activating the ipsilateral (same side) pool of motor neurons innervating extensor muscles in the trunk and limbs, this pathway mediates balance and the maintenance of upright posture.
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