Lecture 9 02/17/2014
Proprioception: neurons with ends in the joints▯to make coordinated movements (cerebellum) “special
People with cerebellum disease can do okay as long as everything else is okay; it is compensated by
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