on 12.1.08 with 0 comments
- The brain receives sensory information from three sources:
- Vestibular part of the inner ear, which is stimulated by head movements i.e. it is responsible for maintenance of equilibrium during head movements:
- The three semi-circular canals are stimulated by angular head movements i.e. rotation.
- The otolith organs (utricle and saccule) are stimulated by linear head movements - i.e. movement in a straight line.
- The brain integrates these sensory information.
- The brain sends motor orders to two groups of muscles:
- The extra-ocular muscles to keep the eyes stable.
- The spinal muscles to keep the limbs and trunk stable.
Category: Physiology Notes