4-Zoology-Organ-Nerve-Brain-Divisions

rhombomere

Bottom brain has eight repeated parts {rhombomere}, with one next to cerebellum and eight near spinal cord. Cells do not migrate from one rhombomere to another. Eighth cranial nerve comes from fourth rhombomere.

lower brain

Low brain part {lower brain} includes medulla oblongata, pons, and cerebellum.

hindbrain

Above spinal cord, bottom brain {hindbrain}| is medulla oblongata then pons.

midbrain

Above pons and further forward, rostrally towards nose, are cerebellar peduncles, inferior olive, quadrigeminal plate, nucleus accumbens, red nucleus, substantia nigra, tectum, and midbrain tegmentum {midbrain}|. All midbrain nuclei have ascending and descending axon tracts. Midbrain is for attention, controls aggressiveness, and predicts adjustments to visual perception that will result from movement, using signal {central kinetic factor} that codes displacement direction and speed.

endbrain

Rostral to midbrain are cerebral-cortex frontal, parietal, temporal, occipital, insular, and limbic lobes, white matter, and basal ganglia {endbrain}.

forebrain

Front brain {forebrain}| contains cerebrum diencephalon and telencephalon: amygdala, basal ganglia, cortex, hippocampus, olfactory bulb, and thalamus.

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Date Modified: 2022.0225