Abnormality of central motor conduction

What it means

Any anomaly of the conduction of motor nerve impulses in the central nervous system.

Nerve conduction velocity in the central motor pathways of the brain and spinal cord can be studied by methods including transcutaneous electrical stimulation of the cortex, cervical cord, thoracic cord and conus medullaris and determination of motor latencies to various muscles. This measure is thought to represent conduction in large diameter fibers in the corticospinal tracts.

Rare diseases that can present with this2

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category