rhizotomy

n. a surgical procedure in which a spinal nerve root is severed within the spinal canal. A rhizotomy may be performed for the relief of pain or to control muscle spasms. The different types of rhizotomy include anterior rhizotomy, in which an anterior (motor) spinal nerve is cut; posterior rhizotomy, in which a posterior (sensory) spinal nerve is cut; and trigeminal rhizotomy, in which the sensory root fibers of the trigeminal nerve are transected.

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Psychology term of the day

October 5th 2024

partition

1. vb. in statistics and measurement, to divide variance observed in the dependent variable into component elements on the basis of its nature and origin.

2. n. a specific component of the observed variance (e.g., variance due to a treatment effect and variance due to random error).