2007-03-10 11:06:47 · 3 answers · asked by jimmy 1 in Science & Mathematics ➔ Medicine
The human brain contains about 50 billion to 200 billion neurons (nobody knows how many for sure), each of which interfaces with 1,000 to 100,000 other neurons through 100 trillion (10^14) to 10 quadrillion (10^16) synaptic junctions.
2007-03-10 11:37:40 · answer #1 · answered by Qualtai 3 · 1⤊ 1⤋
Cranial nerves are nerves that emerge directly from the brain in contrast to spinal nerves which emerge from segments of the spinal cord. Although thirteen cranial nerves in humans fit this description, twelve are conventionally recognized. The nerves from the third onward arise from the brain stem. Except for the tenth and the eleventh nerve, they primarily serve the motor and sensory systems of the head and neck region.
2007-03-10 20:54:16 · answer #2 · answered by gangadharan nair 7 · 0⤊ 0⤋
If you're really intereted in this subject, read In Search of Memory by Eric Kandell, a Nobel Prize winner. Great read!
2007-03-11 06:06:57 · answer #3 · answered by greydoc6 7 · 0⤊ 0⤋