This seems to be an obligatory revision of the ANS lecture full of already learned content.
it controls the body functions without usual conscious effort or action.
Autonomic nervous system controls:
- homeostatsis
- metabolism
- communication
- immune response
- reproduction
Divisions of the ANS are sympathetic, parasympathetic.
sympathetic leaves thoracic and lumbar regions of spinal cord uses adrenaline, and has chain ganglia
fight or flight response
skin skeletal muscle and bone are only SNS
parasympathetic fibres leaves CNS form brain and sacral spinal cord.
ANS has 2 neuron efferent pathway
parasympathetic have ganglia really close to organ
SNS has chain gnagle close to spine
everything usews acetylcholine except final step in SNS
Sypathetic has tonic
PSNS cranial sacral
- cranial/brainstem
- III
- Vii
- IX
- X
- sacral
- preganglionic fibres from s2 s3 s4.
- does pelvic organ and functions
control of ANS
sensory leads to reflexes and local axon reflex autonomic ganglia spinal cord coordinates reflexes brain stem
- PAG parabrachial NTS ventrolateral medulla
- descending pathways / reticulospinaltracts
- cerebrum
- hypothalamus, insula, medial prefrontal cortex, amygdala