BIO 211 Lecture Notes - Lecture 20: Medulla Oblongata, Occipital Lobe, Motor Cortex
4 Aug 2020
School
Department
Course
Professor
Evan Reed
Bio 211
Anatomy and Physio
Spring 2020
Professor Dzinski
● Mesencephalon
■ Processing of visual and auditory data
■ Generation of reflexive somatic motor responses
■ Maintenance of consciousness
○ Hindbrain
■ Pons
● Relays sensory information to cerebellum and thalamus
● Subconscious somatic and visceral motor centers
■ Medulla Oblongata
● Relays sensory information to thalamus and other portions of the
brain stem
● Autonomic centers for regulation of visceral function
(cardiovascular, respiratory, and digestive system activities)
○ Injury above this- patient cannot breathe on their own
■ Cerebellum
● “Little brain” in latin, two hemispheres and large cortex (foldings)
○ Subcortical region of the brain, highly folded that lies
underneath the cortex’s occipital lobe (attached to rear
portion of brain stem)
● Coordinates complex somatic motor patterns
● Adjusts output of other somatic motor centers in brain and spinal
cord- maintains proper position of the body in space
● Important role in planning, initiating, and timing movements by
sending input to the motor areas of cortex
○ Vestibulocerebellum: important in maintaining balance
and controls eye movements
○ Spinocerebellum: enhances muscle tone and coordinates
skilled, voluntary movements
○ Cerebrocerebellum: plays role in planning and initiating
voluntary activity by providing input to cortical motor areas
■ Stores procedural memories
● Subconscious coordination of motor activity (movement)
● Plays a key role in learning skilled motor tasks
○ Coordination: accuracy of complex movements
○ Procedural memory
● Practicing anything stimulates efferent pathways that innervate muscles
○ Becomes much more specialized
Document Summary
Relays sensory information to cerebellum and thalamus. Relays sensory information to thalamus and other portions of the brain stem. Autonomic centers for regulation of visceral function (cardiovascular, respiratory, and digestive system activities) Injury above this- patient cannot breathe on their own. Little brain in latin, two hemispheres and large cortex (foldings) Subcortical region of the brain, highly folded that lies underneath the cortex"s occipital lobe (attached to rear portion of brain stem) Adjusts output of other somatic motor centers in brain and spinal cord- maintains proper position of the body in space. Important role in planning, initiating, and timing movements by sending input to the motor areas of cortex and controls eye movements. Cerebrocerebellum: plays role in planning and initiating skilled, voluntary movements voluntary activity by providing input to cortical motor areas. Plays a key role in learning skilled motor tasks. Practicing anything stimulates efferent pathways that innervate muscles. Ct: a beam of x-rays is shot straight through the brain.
