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Touch etc:
Sensory reception organs (ears, eyes, skin etc.) detect and _______ to events. ________ cells convert specific ________ into _________ signals
respond; receptor; receptor; electrical
Think. This is easy.
Conversion of one form of sensory stimulus to another is....?
Sensory transduction. Sensory stimulus becomes electrical signal in the brain. If they fire continuously with no bad outcome, the brain will disregard them e.g. pressure of clothing
Easy to remember once you know :)
Some skin neurons have narrow ion channels- if these are ___________, depolarization occurs and the neuron fires
stretched!
what you do to an elastic band
Lots of neurons firing to stimulate one other:__________ __________
Sustained, repeated firing of one neuron:___________ ____________
spatial summation; temporal summation. Either is likely to be stimulating enough to cause the receiving neuron to fire
Skin consists of the _________, which is thin; the ____________, which has the most nerves and blood; and the ___________ which is where the skin is attached to the rest of the body
epidermis; dermis; hyperdermis
different types of 'dermis'
More junctions = ________ signals. Skin receptors in toes and hands are _________, stretching to the back of the neck in the _______ _________
slower; long; spinal column
Information from the right-hand side of the body will end up in the _____ hemisphere of the brain, and vice versa
left
Obvs.
Each hemisphere has a __________ _________ _________ (S1). Areas of higher sensitivity (e.g. hands) send information to larger areas of S1 than less sensitive areas (e.g. shoulders)
primary somatosensory cortex- think homunculus. Remember, toes are near genitalia = foot fetish in some people!
3 part word
The secondary somatosensory cortex maps ______ _______ of the body in overlay e.g. right leg and left leg occupy the same area of S1.
both sides
??
A ____________ is an area of skin that is mainly supplied by a single spinal nerve. If the spine is broken, it will depend ______ the break is as to the level of paralysis in these zones.
dermatome; where
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