PNS Flashcards
(16 cards)
What is the peripheral nervous system
All nerves outside of brain and spine
Allows body to be in touch with and respond to physical environment
2 branches of pns
Sensory- input
Motor- output
2 sections of motor
Somatic- voluntary
Autonomic- involuntary
2 sections of autonomic
Sympathetic- fight or flight
Parasympathetic- rest n relax
Sensory receptors
Information gatherers-
-Thermoreceptors- temperature
-Photoreceptors- light
-Chemoreceptors- chemical- change in environment
-Mechanoreceptors- pressure, touch, vibration
-nocireceptors- pain
What are reflexes
Involuntary from spinal cord- dorsal
12 pairs of cranial nerves
OOOTTAFVGVAH
Olfactory
Optic
Oculamotor
Trochlear
Trigeminal
Abducens
Facial
Vestibulocochlear
Glasopharangeal
Vagus
Accessory
Hypoglossal
Are they sensory or motor
SSMMBMBBBBMM
Reflex process in brain
Thalamus- processing
Somatosensory cortex- pain
Limbic system- emotion
Frontal cortex-
Reflex steps
- Stimulus activates receptors
- Spinal cord causes reflex
- Brain interprets and solves
What are neurotransmitters
Chemical messengers that send signals across synapse
What do too much neurotransmitters cause
Addiction
What do too little neurotransmitters cause
Parkinsons
What is the brachial plexus
Nerves from neck to arm
MARMU
5 branches of brachial plexus
Musculocutaneous
Axillary
Radial
Median
Ulnar
What is the lumbosacral plexus
Nerves for skin n muscles of lower abdomen downwards
