C_S_D 4430 Lecture Notes - Lecture 26: Brainstem, Nystagmus, Hypotonia
Document Summary
Responsible for smooth coordination of muscle, maintenance of posture and balance, and the production of rapid, repetitive movements. Receives most of the proprioceptive signals from the spinal cord and various sensory afferents from the cranial nerves. Efferents travel through the deep cerebellar nuclei and ultimately return to the ipsilateral side of the spinal cord. Receives the cerebellar connections from the cerebrum, particularly form primary motor cortex. Efferents travel though the deep cerebellar nuclei, then on to the supplementary motor area (sma) and the premotor cortex on the contralateral side of the cerebrum. Efferents project back out to the vestibular nuclei in the brainstem to control vestibular reflexes. Decomposition of movement: breaking up a complex motor act into its components parts and executing the act movement by movement. Dysdiodochokinesia: inability to perform rapid alternating muscle movements. Tremor: usually a intention/kinetic tremor not present at rest. Nystagmus: rhythmic oscillation of eyes (may be vertical, horizontal, or rotary)
