Chapter 1 - Bio And Behave Flashcards
internerons
Found between other neurons
- mainly in brain and spinal cord
- often linked to reflexive behaviour
What is the PNS made up of/
Nerve tissue and fibres outside brain and spinal chord
31 pairs of spinal nerves
12 pairs of cranial nerves
*olfactory and optic nerves are outgrowth of CNS but considered part of PNS
Somatic nervous system
Sensory and motor neurons distributed throughout skin, joints, muscles
Autonomic nervous system
Para and sympa nervous system:
HR, RR, digestion, glandular secretions
- regulates body temp
…etc you know this
Parasympathetic nervous system
**conserve energy!
Associated with resting and sleeping states
- managing digestion, increasing peristalsis and exocrine secretions
**Acetalcholine responsible for PNS responses
REMEMBER;
- pupils constrict
- bronchi constrict
- bile release stimulated
Sympathetic nervous system
Remember:
- redistributes blood to muscles of locamotion
- increases blood glucose [ ]
- bronchi relax
- dec digestion
- pupils dilate
- release epi into blood stream
Forebrain consists of:
- cerebral cortex
- basal ganglia
- limbic system
- thalamus
- hypothalamus
Thalamus
Sensory relay station
Midbrain
Inferior / superior colliculi
Hindbrain
- cerebellum (refined motor)
- medulla obl (vital functioning)
- reticular formation (arousal and alertness)
Reticular formation
Arousal and alertness
Superior vs inferior colliculi
Superior: receives visual sensory input
Inferior : receives sensory input from auditory system
Electroencephalogram (eeg)
Used to study electrical activity generated by larger groups of neurons
Regional cerebral blood flow (rCBF)
Relying on blood flow to certain regions of brian that are active
Computed tomography
Multiple X-rays at different angles
PET scan
Radioactive SUGAR injected and absorbed into body
MRI
Magnetic field to interact with H
- NMR
fMRI
Measures changes associated with blood flow
*good for monitoring neural activity
Thalamus
1) part of the brain
2) main function
1) forebrain
2) relay station for incoming sensory information
*all senses EXCEPT smell
**transmits info to cortex
Functions of hypothalamus
Four Fs:
- fighting
- feeding
- fucking
- flighting
Lateral Hypothalmus (LH)
“Lacks hunger” when lesioned
*so basically, your (Daniel’s ) LH is definitely not lesioned
Ventromedial Hypothalamus
“Very Much Hungry” when lesion
**satiety center, makes you stop eating
Anterior hypothalamus
Controls sexual behaviour
*also regulates sleep and body temp
Posterior pituitary releases
ADH and Oxytocin
