Receptor of joint capsule and ligaments is

Discussion in 'AIIMS Nov 2013' started by samuel, Nov 28, 2014.

  1. samuel

    samuel New Member

    Receptor of joint capsule and ligaments is
    a) Slow adapting
    b) Fast adapting
    c) Different to slow and fast adapting
    d) Non-adapting

    Answer: Slow adapting

    Explanation:
    The receptors detect mechanical deformation
    within the capsule and ligaments:
    There are four types of sensory endings that
    make up joint receptors; free nerve endings,
    Golgi type endings, ruffini endings, and
    paciniform endings.
    Slowly adapting receptors: Free nerve endings,
    Golgi type endings and ruffini endings
    Fast adapting receptors: Paciniform endings
    The rapidly adapting receptors produce
    generator potentials and action potential
    discharges that follow the time-varying
    waveform of pressure changes produced by a
    vibrating stimulus.
    In contrast, the slowing adapting receptors
    produce generator potentials and action
    potential discharges that are sustained and
    unable to mimic the time-varying pattern of the
    stimulus.
    Consequently, the responses of rapidly
    adapting 1° afferents are best suited for
    representing time varying (e.g., vibrating or
    moving) stimuli, whereas slowly adapting 1°
    afferents better represent static stimuli (e.g.,
    sustained pressure).

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