afferent neuron arachnoid arbor vitae archipallium autonomic nervous system axon between brain brain brain stem central nervous system cerebellar hemispheres cerebellum cerebrospinal fluid cerebrum convolution corpus callosum corpus striatum craniosacral nervous system dendrite diencephalon dura mater effector organ efferent neuron endbrain fissure folia forebrain fornix frontal lobe ganglion glial cells globus pallidus gray matter gyrus hindbrain hippocampus hypothalamus internuncial neuron lenticular nucleus limbic lobe little brain lobe mantle medulla oblongata medullary sheath meninges mesencephalon metencephalon midbrain myelencephalon neopallium nerve nerve trunk nervous system neuron occipital lobe optic chiasm pallium parietal lobe peripheral nervous system pia mater pineal body pituitary body plexus pons reticular system rhombencephalon sensorium sensory area sensory cell solar plexus spinal cord subthalamus synapse telencephalon temporal lobe thalamus thoracolumbar nervous system ventricle vermis white matter