Phineas Gage worked in P.T. Barnum's circus as a sideshow exhibit.
No two neurons are exactly alike.
Inside the axon there are normally more positive than negative ions.
Neurons can fire up to 10,000 times per second.
Nigel suffers from tremors, facial ticks and muscle spasms, and is extremely rigid in his movement. He quite likely has a deficiency of the neurotransmitter dopamine.
The spinal cord is capable of influencing behavior without the help of the brain.
The human brain weighs approximately 5 pounds.
The right cerebral hemisphere controls movement and feeling on the left side of the body.
Because of it's outward appearance, the cortex is often referred to as white matter.
The gray matter of the cerebral cortex is composed of numerous folds called convolutions and contains the sensory, motor and association areas of the brain.
There is a precise one-to-one correspondence between specific points on the motor cortex and the movement of particular body parts.
Both Broca's aphasia and Wernicke's aphasia are types of language deficits that stem from damage to an area of the somatosensory cortex in the left cerebral hemisphere.
People who cannot speak due to Broca's aphasia are often able to sing.
A person who sustains damage to one primary visual cortex will lose partial vision in both eyes.
Association areas in the temporal lobes house memories that enable you to recognize and differentiate between types of sounds.
Left-handed people have larger corpus callosums than right-handed people.
Left-handed people tend to have higher rates of mental disorders than do right-handers.
Modern researchers rely primarily on autopsies to learn more about the human brain.
The human brain continues to grow into adulthood.
Once damaged, neurons in the brain are incapable of regeneration.