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Muscle Spindles vs. Golgi Tendon Organs
Two Types of Specialized Receptors
13
Anatomy
Undergraduate 2
09/23/2012

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Term
muscle spindles
Definition

detect degree and rate of change in muscle length

(even if eyes are closed, still know where limbs are, can feel the muscles because the message is being sent to the cerebrum)

Term
muscle spindles
Definition
help maintain muscle tone
Term
muscle spindles
Definition
complex, small sensorimotor organ
Term
muscle spindles
Definition
consists of 3-5 specialized intrafusal fibers
Term
muscle spindles
Definition
lie parallel to surrounding extrafusal (striate) muscle fibers
Term
golgi tendon organs
Definition
monitor degree of muscle tension during muscle contraction
Term
golgi tendon organs
Definition
reflexively inhibit muscle contraction; permit muscle to stretch to prevent injury caused by excessive contraction
Term
golgi tendon organs
Definition
innervate tough tissues that attach muscles to bones
Term
golgi tendon organs
Definition
regulate muscle tension
Term
golgi tendon organs
Definition
prevent generation of too-sudden or excessive force that could damage muscle or its insertion
Term
golgi tendon organs
Definition
whenever muscle contraction is excessive, stimulates tendon organ fibers, which activate intervening inhibitory interneurons of spinal cord
Term
golgi tendon organs
Definition
interneurons inhibit alpha-motor nuclei
Term
golgi tendon organs
Definition
accounts for autogenic inhibition
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