HUMB1000 Lecture Notes - Lecture 12: Medulla Oblongata, Rapid Eye Movement Sleep, Brainstem
3 Aug 2018
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Document Summary
Divisions: forebrain that forms the cerebrum and diencephalon, midbrain, hindbrain that forms the pons, medulla oblongata and. The midbrain, pons and medulla oblongata together form the brain stem. Medulla oblongata: autonomic reflex centre maintaining body homeostasis, cardiovascular centre. Regulates heart rate, force of heart contraction and blood vessel diameter: respiratory centre. Regulates rate and depth of breathing: other reflexes. Pons =bridge: contains conduction tracts (used for communication): Longitudinal tracts from the spinal cord to higher brain centres. Transverse tracts form the cerebrum (motor cortex) and cerebellum: sleep centre. Regulates rapid eye movement: respiratory centre (works with rc of the medulla oblongata) Midbrain: receives visual, auditory and tactile sensory input generating reflex movements of the head, eyes and body, controlling movement of the eye and lens dilation. Communicates with brain stem to: controls locomotion, in association with the cerebrum, controls fine motor control (writing, playing instrument [small muscle movements], controls posture and balance (without it we have jerky movements)
