Babinski reflex and corticospinal tract lesion

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Golgi Tendon Organ•Located at the junction between muscle fibers and tendon•Connected in series with the skeletal muscle fibers•Tendon Organs are most sensitive to muscle tension•Innervated by a single Ib axon, which demyelinates whenentering the capsule. There is branches into many small endingswhich intertwine with the collagen fibers.•Stretching of the tendon organ (when the muscle contracts)straightens the collagen fibers, compressing the Ib branches andcausing the cell to fire•The average level of activity in a population of tendon organsin a muscle gives a good idea of the force done by the muscleMuscle spindles: sensitive to changes in muscle length.Golgi tendon organs: sensitive to changes in muscle tension.9Muscle Spindle vs Golgi Tendon Organ10
Summary of Sensory FibersIa•Goes from the chain and bag nuclear fibers (static and dynamic) of themuscle spindle to the spinal cord.•Sensitive to muscle length and rate of change of lengthII• Goes from the chain and bag nuclear fibers (static) of the muscle spindle tothe spinal cord.•Sensitive to muscle lengthIb•Goes from the Golgi Tendon Organs to the spinal cord.•Sensitive to muscle tensionAnd others that respond to painful stimuli, temperature, etc11Stretch Reflex12
Page 1 and 2: Babinski reflex and corticospinal t
Page 3 and 4: Muscle SpindlesIntrafusal musclefib
Page 5: Activation of gamma MN during activ
Page 9: Functions of the Ia inhibitory inte

Babinski reflex and corticospinal tract lesion

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