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Cathexis

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• Cation

  Cation: In chemistry, a positively charged ion. Pronounced cat-I-on. A cation is as opposed to an anion, which is a negatively charged ion.

• Cauda equina

  Cauda equina: A bundle of spinal nerve roots that arise from the end of the spinal cord. The cauda equina comprises the roots of all the spinal nerves below the first lumbar (L1) vertebra in the lower back.

• Cauda equina syndrome

  Impairment of the nerves in the cauda equina, characterized by dull pain in the lower back and upper buttocks and lack of feeling (analgesia) in the buttocks, genitalia, and thigh, together with disturbances of bowel and bladder function.

• Caudad

  Caudad: Toward the feet (or, in embryology, toward the tail), as opposed to cranial. The spinal cord is caudad to the brain. For a more complete listing of terms used in medicine for spatial orientation, please see the entry to “Anatomic Orientation Terms”.

• Caudal

  Caudal: An anatomic term meaning 1. Pertaining to the tail or the hind part. 2. Situated in or directed toward the tail or hind part. 3. Inferior to another structure, in the sense of being below it. Caudal is also short for caudal epidural anesthesia. The terms caudal and caudad are both derived from the […]

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