BIOSC-116 Lecture Notes - Lecture 3: Intention Tremor, Premotor Cortex, Proprioception
26 Aug 2020
School
Department
Course
Professor
Document Summary
They act slower, use oxygen and are resistant to fatigue. They have lots of mitochondria and blood vessels. They don"t use much oxygen, act fast and fatigue rapidly. They have few mitochondria and little blood vessels. They are larger diameter cells than oxidative (more thick and thin filaments) and are stronger. Pyramidal system comes from the cerebral cortex. This system decussates (crosses over to the opposite side so the right side of the brain controls the left side of the body) Primary roles fine motor control, especially of the distal muscles of the hand. Basic components sensorimotor cortex (frontal lobe), pyramidal tracts (in spinal cord) Extrapyramidal systems comes from the brainstem. Primary roles controls proximal muscles of limbs and muscles of trunk for upright posture, balance, walking. Basic components extrapyramidal nuclei in the brainstem, extrapyramidal tracts in spinal cord. Cerebellum = the main coordinator of movement.
