Module 3: Distribution of Sensory Impairments with CNS vs PNS lesions

lesions to the spinal nerve root causes what kind of sensory loss pattern?

dermatomal pattern, classic reticulopathy with traveling numbness, tingling, shooting pain that follows dermatomal patterns

lesions to the peripheral nerve causes what kind of sensory loss pattern?

follow single or multiple peripheral nerve distribution

lesion to the cortical regions causes what kind of sensory loss pattern?

regional pattern- the individual nerves are still intact but area of brain has been affected

what is the sensory testing hierachy?

start with superficial sensation, move to deep sensation, and then combined/cortical sensation

what are the components of superficial sensation?

discriminitive/light touch, sharp/dull, hot/cold discrimination

what are the components of deep sensation?

proprioception, vibration

what are the components of cortical sensation?

sterognosis, graphesthesia, 2 point discrimination, tactile localization

what pathways are involved in superficial sensation?

DCML and STT

what pathway is involved in deep sensation?

DCML

what does combined/cortical sensation require?

intact deep and superficial sensation, depends on integration of the primary sensory cortex and the association cortex