Lecture 12

Lecture 12 - Types of Chemical Communication Picture 1 I....

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Picture 1 Picture 2 Picture 3 Picture 4 Picture 5 Types of Chemical Communication I. DIFFUSE MODULATORY SYSTEMS Discrete nuclei send vast projections throughout the brain serving the coordinate brain function. Neurotransmission is reciprocal (indirectly; i.e. the nuclei which send diffuse projections are under control of other brain regions).
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Picture 6 Picture 7 Picture 8 Picture 9 Picture 10 Picture 1 Circadian Rhythms: Hypothalamus & Modulatory Systems - The Hypothalamus Periventricular zone of hypothalamus is critical for: Circadian (sleep/wake) cycles Autonomic nervous system regulation Endocrine regulation - coordinates brain function with the rest of body
Background image of page 2
Picture 12 Picture 13 Picture 14 Picture 15 SCN provides gross temporal control of sleep patterns (i.e. sleep vs. wake). Neural circuits for inducing the sleeping “brain state” are in the brain stem . o Pons/pontine, raphe, locus coeruleus, reticular formation; i.e. the diffuse modulatory system(s) – NE, 5HT, Ach involved in coordinating brain activity. o These are complex systems that are also involved in arousal of brain during waking states as well as sleep (i.e. sleep is an example of how these systems work). There are two major classes of sleep: Non-rapid eye movement ( NREM ) and Rapid eye movement ( REM ) Transition between wake  NREM  REM is controlled by reticulur formation (formerly reticular activating formation). Coordinated activation of Ach, NE, 5HT diffuse modulatory structures to control brain activity Overall brain activity is NOT decreased during sleep. II. AUTONOMIC NERVOUS SYSTEM AUTONOMIC NERVOUS SYSTEM TARGETS
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Picture 17 Picture 18 Picture 19 Picture 20 Sympathetic and Parasympathetic NS regulate all other parts of the body. Sympathetic and Parasympathetic have opposite effects on targets. Pre-ganglionic neurotransmitter is Ach for both sympathetic and parasympathetic NS. Post-ganglionic NT is Ach for both parasympathetic NS and NE for sympathetic NS. Some targets are glands… Sympathetic activated during stress (i.e. need energy fast; “fight or flight” Parasympathetic activated when relaxed; stores energy. III. ENDOCRINE SYSTEM
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 14

Lecture 12 - Types of Chemical Communication Picture 1 I....

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online