Neurophysiology - RH Flashcards
What does the Nernst equation calculate?
The equilibrium potential
What is the Nernst equation?
E = 61.5 x log10 (ions out)/(ions in)
What does the goldmann equation calculate?
Predicts the membrane potential
Takes into account permeability
What does descending inputs mean from he CNS?
The fact that the CNS is always the highest control so can stop spinal cord
What is the ‘leg tap’ reflex pathway called?
Stretch and tendon reflex pathway
Inverse myotatic
What do muscle spindles detect in the stretch and tendon reflex pathway?
The change in the length of the muscle
What doe the Golgi tendon organs detect in the stretch and tendon reflex pathway?
The muscle tension
What is the reflex when you touch something hot?
Flexor withdrawal reflex pathway
What are contralateral reflexes?
Antagonise movement changes caused by a reflex or conscious movement eg. to stop falling over
What are innate reflexes?
Present from birth, predictable
What are acquired reflexes?
Learned, vary each time, unpredictable
What are effectors in the autonomic nervous system?
Cardiac muscle
Smooth muscle
Some glands
What is the sympathetic nervous system sometimes called?
Thoraco-lumbar
What is the parasympathetic nervous system sometimes called?
Cranio-sacral
What are some sympathetic synapses?
Acetylcholine with nicotinic receptors
Noradrenaline with adrenergic receptors
