Academy of Doctors of Audiology. Advanced Beneficiary Notice FAQ. The Advanced Beneficiary Notice of Noncoverage (ABN) is a Medicare document that is used to notify Medicare beneficiaries of their potential financial responsibilities prior to the rendering of a service or the dispensing of an item.
primary sensory neuron. A sensory neuron that is the first in an afferent pathway, beginning at the receptor and ending at a synapse with a secondary sensory neuron, often within a nucleus of the central nervous system. One common type is the pseudounipolar neuron. 1  pseudounipolar neuron.  secondary sensory neuron.
A sensory neuron (also known as afferent nerve fiber) carries the sensory message through neural pathways to the central nervous system (spinal cord and or brain) The central nervous system interprets the sensory information and determines the necessary response. A motor neuron (efferent fibers) carries the response message to the effector (skeletal muscle, non-skeletal. muscle, gland, organ or vascular pathway) responsible for generating the motor response.