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7 Cards in this Set
- Front
- Back
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Nerve |
A bundle of axons in the PNS. Only one collection of CNS axons is called a nerve: the optic nerve. |
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White Matter |
A generic term for a collection of CNS axons. When a freshly dissected brain is cut open, axons appear white. |
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Tract |
A collection of CNS axons having a common site of origin and a common destination. Example: corticospinal tract, which originates in the cerebral cortex and ends in the spinal cord. |
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Bundle |
A collection of axons that run together but do not necessarily have the same origin and destination. Example: medial forebrain bundle, which connects cells scattered within the cerebrum and brain stem. |
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Capsule |
A collection of axons that connect the cerebrum with the brain stem. Example: internal capsule, which connects the brain stem with the cerebral cortex. |
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Commissure |
Any collection of axons that connect one side of the brain with the other side |
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Lemniscus |
A tract that meanders through the brain like a ribbon. Example: medial lemniscus, which brings touch infor- mation from the spinal cord through the brain stem |
