PHIS 206 Lecture Notes - Lecture 7: Afferent Nerve Fiber, Reticular Formation, Long-Term Memory
2 May 2018
School
Department
Course
Professor
Lecture 7: Rest of CNS/PNS Afferent Division
Limbic System
• Collection of structures
o Governs basic emotions
o Primal behaviors
• Pharmaceutical Target
o Antidepressant Medications
o Recreational Drugs
• People take recreational drugs to feel good until they don’t make them feel good anymore
• Closely ties to sensation of smell
• Depression shouldn’t be a natural basic emotion, it’s linked to a lack of communication
in the limbic system
Memory
• Short-Term -- altering amount of neurotransmitters released
• Long-Term -- relatively permanent functional or structural changes between existing
neurons (new synapses formed, new proteins synthesized = key role)
• Working (Short-Short Term)
• Formed through changes in synaptic architecture
• Ability to store data
• Synapse plays an important part in memory
• When specific nerves communicate a lot (many transmissions?), they get better at it →
when nerves continually make connections, physical changes will occur between nerve A
and nerve B in a permanent matter (long term memory)
Cerebellum
• Components
o Vestibulocerebellum -- Balance, control of eye movement
o Spinocerebellum -- coordination of skilled voluntary movement, makes our
decisions to move work for us, regulation of muscle tone
o Cerebrocerebellum -- storage of procedural memories,
• Cerebellum have half the neurons in our brain, takes up about 10% of space in our brain
Brain Stem
• Components
o Medulla
o Pons
o Midbrain
• Reticular Activating System
o Manipulation of sensory information
o Reticular formation → Thalamus
o Awareness
o Target of ADHD meds
• Autonomic functions regulated in brain stem (breathing, heartbeat, etc)
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
), they get better at it when nerves continually make connections, physical changes will occur between nerve a and nerve b in a permanent matter (long term memory) Brain stem: components, medulla, pons, midbrain, reticular activating system, manipulation of sensory information, reticular formation thalamus, awareness, target of adhd meds, autonomic functions regulated in brain stem (breathing, heartbeat, etc, most adhd meds are stimulants, stimulates awareness. Spinal cord: diagram, many nerves coming out near neck (control arms) and coming out near butt/legs (control legs, babies only have 1 curve, they develop as baby stands, crawls, sits up, etc. Neurons of the gray: gray becomes nothing is myelinated here mostly cell bodies, the myelinated axons are the white matter tracts, gray matter job is to computate within the later, white matter moves info up and down. Info flows into dorsal horn, out of ventral horn spinal cord.
