What anatomical structure is described with the following description:
1. ventral portion of the cerebrum
2. composed of myelinated axons
3. vision
4. balance and coordination
5. precentral gyrus
6. memory and hearing
7. regulates reflexinve actions
8. regulates homeostatic and endocrine functions
9. speech comprehension
10. sensory map of the body
11. white matter in cerebellum
12. connects cerebral hemispheres
13. superior to hypothalamus
14. critical thinking higher cognitive functions
15. motor speech area of brain
16. bridges upper brain to lower brain areas
17. sensory afferents enter this
18. regulate breathing and heart rate
19. location of motor neuron's cell body
20. enters the spinal cord
21. exits the spinal cord
22. outermost meningeal layer
23. cerebrospinal fluid circulates beneath
24. composed of cell bodies and dendrites