Download Bates Video Guide Vol. 18. Nervous System_ Sensory System & Reflexes (latest2023) complete and more Study notes Nursing in PDF only on Docsity! To help localize neurologic lesions, the body is commonly mapped into derma skin bands innervated by the sensory root of a single spinal nerve. It is he ourself first with the dermatomes shaded in green. 1 Vol. 18. Nervous System: Sensory System & Reflexes Learning Objectives โ Assess pain, temperature, light touch, & vibratory sensation โ Assess position sense & discriminative sensation โ Elicit deep tendon reflexes (DTRs) of biceps, triceps, brachioradialis, knee (or patellar tendon), & ankle (or Achilles tendon) โ Properly test the plantar response or Babinskiโs sign Sensory impulses: โ Participate in reflex activity โ Give rise to conscious sensation โ Calibrate body position in space โ Help regulate autonomic functions โ I.e. BP, HR, & RR Anatomy Review- Sensory System tomes, which are lpful to familiarize y A complex system of sensory receptors relays impulses from skin, mucous membranes, muscles, tendons, viscera that travel through peripheral projections into the posterior root ganglia and are eventually directed to the spinal cord and into the brain. When assessing vibratory sensation: โ Some slight distal to proximal gradient may be found โ Vibratory sense is often impaired in alcoholic peripheral neuropathy Testing of discriminative sensations: โ Stereognosis- the ability to identify an object by feeling it โ Graphesthesia- number identification โ Two-point discrimination โ Point localization โ Extinction (or double extinction) Anatomy Review- Reflexes DTRs are involuntary monosynaptic cord reflexes arising from the stimulation of partially stretched muscle fibers. This sudden additional stretching sends impulses along afferent sensory nerve fibers to synapses in the spinal cord. Then afferent nerve fibers carry the impulses back to the muscle fibers, causing them to contract. Interruption of these monosynaptic arcs anywhere along their paths will cause loss of the reflex.
