| 释义 |
supranuclear
supranuclear[¦sü·prə′nü·klē·ər] (anatomy) In the nervous system, central to a nucleus. supranuclear
su·pra·nu·cle·ar (sū'pră-nū'klē-ăr), 1. Above (cranial to) the level of the motor neurons of the spinal or cranial nerves; those pathways the suprasegmental nerve fibers follow to reach the motor cell bodies in the brainstem. As used in clinical neurology, supranuclear indicates disorders of movement caused by destruction or functional impairment of brain structures other than the motor neurons, such as the motor cortex, pyramidal tract, or striate body, for example, supranuclear palsy, as distinguished from the nuclear (or flaccid, or "lower motor neuron") paralysis that results from destruction or functional impairment of the motor neurons or their axons in a peripheral nerve. 2. Region of the cytoplasm apical to the nucleus. su·pra·nu·cle·ar (sū'pră-nū'klē-ăr) Above (cranial to) the level of the motor neurons of the spinal or cranial nerves; the pathways the suprasegmental nerve fibers follow to reach the motor cell bodies in the brainstem; as used in clinical neurology, supranuclear indicates disorders of movement caused by destruction or functional impairment of brain structures other than the motor neurons, such as the motor cortex, pyramidal tract, or striate body, e.g., supranuclear palsy, as distinguished from the nuclear (or flaccid, or "lower motor neuron") paralysis that results from destruction or functional impairment of the motor neurons or their axons in a peripheral nerve. supranuclear In general, referring to nerve fibres situated above a nucleus, such as the abducens, oculomotor and trochlear cranial nerve nuclei.su·pra·nu·cle·ar (sū'pră-nū'klē-ăr) Above (i.e., cranial to) level of motor neurons of spinal or cranial nerves. |