Human brain produced and circulated. Underneath the cerebral cortex are several important structures, including the thalamus, the epithalamus, the pineal gland, the hypothalamus, the pituitary gland, and the subthalamus; the limbic structures, including the amygdala and the hippocampus; the claustrum, the various nuclei of the basal ganglia; the basal forebrain structures, and the three circumventricular organs. The cells of the brain include neurons and supportive glial cells. There are more than 86 billion neurons in the brain, and a more or less equal number of other cells. Brain activity is made possible by the interconnections of neurons and their release of neurotransmitters
The Brain of Colonel Barham on Mars. But the best candidate for the job, Col. Barham, is dying of an incurable ailment. It is decided to separate his brain from his body and keep it alive, with neural implants connecting it to visual and audio input/output for the mission. But without a body, the brain becomes extremely powerful and megalomaniacal. "Progress goes on. One experiment fails, but even out of failure valuable lessons are learned. A way will be found, someday, somehow. It always is." The Brain of Colonel Barham "The Brain of Colonel Barham" (original title: The Brain of Donald Duncan) is an episode