Nervous System Flashcards
(12 cards)
Functions of nervous system (2)
Coordinates activities in the body.
Detects + responds to changes inside + outside the body.
What is the brain protected by and what are the 5 sections?
Cranium
- Cerebrum - conscious thought, memory, sensory info interpretation
- Cerebellum
- Diencephalon
- Mid brain
- Pons
- Medulla obligata
What are the brains surrounding membranes called?
What is the cerebrum and what lobes are found in it?
Meninges.
2 central hemispheres
1) frontal lobe - personality + speech
2) temporal lobe - hearing
3) occipital lobe - vision.
Function / injury of the spinal cord
Highway for communication between body + brain.
Injury means exchange of information with brain + other body parts is disrupted.
Peripheral nervous system
Outside the brain + spinal cord, form communication network between CNS + body parts.
Autonomic nervous system (2)
Nerves connecting CNS to organs such as heart, stomach + intestines.
Mediates unconscious activities.
Somatic nervous system (4)
Nerves going to skin + muscles.
Involved in conscious activities.
Afferent spinal nerves - carry info from body to brain.
Efferent spinal nerves - carry info from brain to body.
Principle of all or none law (4)
Muscle fibres don’t partially contract, either contract fully or not at all.
Number of motor units recruited is determined by force muscle generates e/g/ more strength = more motor units - means muscle maintain force throughout contraction.
A light looking box that’s heavy - not enough motor units recruited.
A heavy looking box that’s light - too many motor units recruited.
What is the neuromuscular junction?
The communication point between brain + muscle.
How to enhance neuromuscular connections?
By challenging a system, improves it as if the muscles aren’t challenged the neuromuscular system becomes less capable.
What does strength training do to strength?
Increases it between 6-20 weeks due to improved synchronisation of motor unit firing + ability to recruit more.
What do beginners experience when the start strength training and why is exercise important?
Experiences rapid improvement as body recruits more motor units.
Exercise leads to better motor fitness.
