Chris Johnson - L5 0.0 / 5 ? PharmacySomatosenosoryUniversityNone Created by: RscottqubCreated on: 29-03-19 16:24 Somatosensory part of the sensory NS responsible for touch, pressure, temperature,pain, joint position 1 of 26 1st order neurones have receptors at nerve endings, bodies are located in the DRG, enter spinal cord via dorsal roots 2 of 26 2nd order neurones synapse with 1st order, travel to brain via ascending tracts 3 of 26 ascending tracts connect 2nd order neurones to 3rd order . 3rd order then transmit to sensory cortex 4 of 26 4 types of neurone Aa, AB, Asigma, C 5 of 26 Aa muscle spindle, GTO , touch and pressure 6 of 26 AB touch, pressure , vibration 7 of 26 Asigma touch pressure, pain, temp 8 of 26 C pain and temp 9 of 26 what type of information does the spinothalamic tract deliver TEMP, PAIN, PRESSURE 10 of 26 Whate type of information does the dorsal column deliver fine touch and vibration 11 of 26 transmittance via which tract involves crossing over in the spine ? spinothalamic tract 12 of 26 where does the dorsal collumn route cross the midline? after leaving the dorsal column nuclei to travel to the thalmus 13 of 26 the more sensitive an organ... the more area dedicated to this region in the somatosensory cortex 14 of 26 Dermatone area of the skin sensation associated with a particular spinal level 15 of 26 Somatosensory defects (2) peripheral lesions. brain/spine lesions 16 of 26 peripheral lesions localised symptoms ie. stomach cramps 17 of 26 brain/spinal lesions wide spread symptoms 18 of 26 defects of the primary sensory neurones can be due to trauma, nerve root damage, neuropathy- alcohol, chemo etc. 19 of 26 what can defects of primary sensory/1st order neurones lead to numbness/pins and needles 20 of 26 defects of ascending tracts - ie dorsal /spinothalamic bilateral, unilateral, temp + pain loss 21 of 26 bilateral sensory loss in all modalities below level of lesion 22 of 26 unilateral joint position loss on the SAME side as lesion 23 of 26 temp and pain loss on the opposite side to lesion 24 of 26 modalities light, sound,taste,temp,smell, pressure 25 of 26 Damage within brain causes loss from opp side of body 26 of 26
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