visual body reflex(anatomy)
Last reviewed 01/2018
The following are types of visual body reflex:
- automatic scanning movements of the eyes and head when reading
- automatic movement of the eyes, head and neck toward the source of a visual stimulus
- protective closing of eyes after a visual stimulus
- protective raising of the arm after a visual stimulus
All are mediated via the following pathways:
- afferent: retina - optic nerve - chiasm - optic tract - superior colliculus
- efferent:
- superior colliculus - tectospinal tract - anterior grey column of spinal cord - alpha-motor neurones
- superior colliculus - tectobulbar tract - cranial motor nuclei