Somatosens - Study guides, Class notes & Summaries

CNIM Highlighted 4 Somatosensory evoked potential monitoring during scoliosis surgery may replace the need for the: A- Removal of hardware B- Ruben hematocrit test C- Stagnara wake-up test D- O'Hara clonus test - answer-C- Stagnara wake-up test Somatosensory evoked potentials are less reliable in patients with: A- A tethered spinal cord B- Severe scoliosis C- Neuromuscular disease D- History of nicotine abuse - answer-C- Neuromuscular disease Monitoring somatosensory function may fa...

NR 412 Exam 2 (Acid/Base, Pulmonary, Somatosensory) Questions With Complete Solutions

Merkell cells - ~~> - slowly adapting - 25% of mechanosensory afferents in hand - highest spatial resolution - edges, points, corners, curvature - static indentation ** Meissener - ~~> - rapidly adapting -40% of mechanosensory innervation in hand - skin motion, indentation, low frequency vibrations for textured objects*** - more than 4x more sensitive than Merkell to skin deformation, but larger receptive fields so less spatial resolution - ie. tea set plate etchin...

RAPID-adapting mechanoreceptors - ️️Meissner and Pacinian (dynamic phase QUICKLY becomes static phase) dorsal root ganglion (DRG) - ️️(part of the PNS) cluster of cell bodies in the dorsal root of a spinal nerve (when the action potential reaches the DRG, it splits into 2 - one travels toward the cell body and the other continues down the axon) dorsal horn - ️️the POSTERIOR column of grey matter in the spinal cord (shape differs depending on spinal segment) - contains SENSORY n...

dermatome - ~~> the area of skin supplied by the sensory axons of a single spinal nerve dorsal horn - ~~> the POSTERIOR column of grey matter in the spinal cord (shape differs depending on spinal segment) - contains SENSORY neuron cell bodies ventral horn - ~~> the ANTERIOR column of grey matter in the spinal cord (shape differs depending on spinal segment) - contains MOTOR neuron cell bodies 3 types of primary somatosensory afferent axons - ~~> 1) Aβ 2) Aδ 3...

DCML - 1) mechanosensory receptors send info to fibers in gracile & cuneate pathways 2) fibers travel to caudal medulla, synapse at dorsal column nucleus (and switch sides) 3) exit DCN as arcuate fibers, cross the midline to form medial lemniscus carries through pons, midbrain, brainstem 4) synapse at thalamus (VPL) 5) internal capsule takes axons to post-central gyrus/S1, some to S2. Meissener - - rapidly adapting -40% of mechanosensory innervation in hand - skin motion, indentation, lo...

NUR 529 - Exam 1 (Somatosensory Function, Pain, Headache, Temperature Regulation) Questions And Revised Correct Answers | Already Passed what does somatosensory component of NS do? - Answer -provides the CNS an awareness of body sensations such as touch, temperature, body position, and pain sensory neuron types (3) - Answer -general somatic afferent neurons special somatic afferent neurons general visceral afferent neurons general somatic afferent neurons - Answer -have branches with ...

Evoked Potentials - Answer The electrical response of the nervous system to external stimulation 2 Types of EPs - Answer 1. Sensory: Stimulus is delivered peripherally (ear, leg, arm, etc.), and the resulting response is recorded centrally (the cortex) 2. Motor: stimulus is delivered centrally (cortex, spinal cord) and the resulting response is recorded peripherally (at a peripheral nerve or muscle) Depending on the stim modality, sensory EPs are divided into - Answer -Somatosenso...

Spinal Recording Site for lower SSEPs - Answer T10-T12 and generates the lumbar potential Cervical recording site for lower SSEPs - Answer Typically at cervical vertebra 5 Alternative recording sites for SSEP - Answer A1/A2 or M1/M2 to reference Peripheral recording site for upper SSEPs - Answer Erb's point Erb's point - Answer records a propagating signal from the Brachial Plexus -this data point is often useful in detecting positioning effect Upper recording cervica...