Motor Pathways Flashcards
Decussation
Crossing of axons from one side to the other
Fasiculus
A smaller bundle of fibers, within funiculus
Funiculus
A bundle of nerve fibers
Paresis
Diminished ability or lack of ability to voluntarily activate spinal motor neurons
Neurons in a descending pathway are known as
Upper motor neurons
How much of the corticospinal tract crosses over to control movement on the other side of the body
90%
Corticospinal tract arises from which two lobes?
Frontal and parietal
Reeticulospinal tract is wired to control which side of the body
Both
Which tracts synapse on interneurons and alpha motor neurons to control axial (trunk) and proximal muscles?
Reticulospinal tract
Ventral corticospinal tract
Eyes, head, neck, and trunk movements are most influenced by which tract?
Vestibulospinal
Which pathway descends ipsilaterally and does not carry information from both sides of the cerebral cortex?
Lateral vestibulospinal tract
Which 2 pathways descend bilaterally?
Reticulospinal
Medial vestibulospinal
Control of proximal and distal musculature, especially the dexterous movements of the fingers, is primarily due to which tract in humans?
Lateral corticospinal
Reticulospinal tract is particularly important for the control of what
Anticipatory postural adjustments
