NETTER - Neuroscience Flash Cards

Central Control of Eye Movements
1. Frontal eye fields (Area 8)
2. Occipital eye fields (Areas 17, 18, 19)
3. Interstitial nucleus of Cajal
4. Superior colliculus
5. Oculomotor nucleus
6. Abducens internuclear neuronal projection
7. Trochlear nucleus
8. Medial longitudinal fasciculi
9. Abducens nucleus
10. Parapontine reticular formation (PPRF)
11. Vestibular ganglion and nerve
12. Vestibular nuclei
13. Corticoreticular fibers
Comment: Central control of eye movements is achieved through
the coordination of extraocular motor nuclei for CNs III, IV, and VI;
this is achieved through the parapontine reticular formation (PPRF,
horizontal gaze center). The PPRF receives input from the vestibular
nuclei, the deep layers of the superior colliculus (reflecting inputs
from V1, V2, and V3), the frontal eye fields of the cerebral cortex, and
the interstitial nucleus of Cajal (reflecting inputs from the vestibular
nuclei and the frontal eye fields). The PPRF drives the ipsilateral
abducens nucleus for movement of the lateral rectus muscle,
and the contralateral oculomotor nucleus (via interneurons in the
abducens nucleus) for movement of the medial rectus muscle of the
contralateral side, thereby coordinating horizontal eye movements.
The interstitial nucleus of Cajal helps to coordinate vertical and
oblique eye movements. Secondary sensory vestibular projections
also terminate in the extraocular motor CNN. Axons interconnecting
the extraocular motor nuclei travel through the medial longitudinal
fasciculus.
Systemic Neuroscience See book 15.14