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Lecture 9

Lecture 9 BI315.docx

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Department
Biology
Course
CAS BI 315
Professor
Eric Widmaier
Semester
Spring

Description
Lecture 9 02/17/2014 Proprioception: neurons with ends in the joints▯to make coordinated movements (cerebellum) “special  sense” People with cerebellum disease can do okay as long as everything else is okay; it is compensated by  vision.  Sense of space for your head by signals for the inner ear▯inputs to the cerebellum (damaged=vertigo) Hindbrain: pons and medulla oblongata Hindbrain and midbrain=brain stem Brain stem: one of the only parts of the brain that is essential for life (and also the hypothalamus). Problems  with the quality of life, but not life. Reticular formation­subgroup of nuclei located on the length of the brain stem, heavily interconnected. Cell  bodys are interconnected with each other and send signals to parts of the brain and spinal cord.  Vegetative functions i.e. breathing (pacemaker for breathing) Baroreceptors­regulates blood pressure; reflex for changing heart rate Sleep/wake cycle­damages to this part of the RF=coma Concentration: attend to something important Send signals to the cortex (other parts of the brain) Filtering information from important to unimportant Inputs are getting to the brain stem▯from sensory receptors. Thalamus decides from important and unimportant Midbrain­sensory reflexes: pupillary reflex; vast amounts of fibers to 3 majors regions Mesocorticol pathway: attention, ordered thinking, working memory (NT: norepinephrine) Mesolimbic pathway: reward and motivation Nigrastriatal pathway: motor control All controlled by dopamine. The neurotransmitter found largely in the brain stem is serotonin▯goes everywhere, not only in the brain 
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