Postural reflexes

Postural reflexes (Franz. posture; from lat. positura - position)- reflexes, ensuring the preservation of certain provisions of the whole organism or this or that part thereof (for example, any limb or its segment).
The term proposed by Sherrington (C. Sherrington).
The concept of postural reflexes oppose the notion of motor reflexes, the effect of which is movement. Irritation, cause postural reflexes, are directed in the Central nervous system from proprioception (centripetally conductors)that go from the organs of the movement, mainly from the muscles or from the maze.
In the clinic under the postural reflexes mean reflexes, increased which is typical for extrapyramidal rigidity when the shaking palsy postentsefaliticheskom parkinsonizme, pseudosclerosis, hepato-lenticular degeneration, and so on, these include ankle phenomenon (paradoxical phenomenon Westphal (and the phenomenon of the lower leg) Tavener - Foy).
Stop the phenomenon lies in the tonic stress extensor of the foot, especially anterior tibial muscle (sharp speech tendon) passive extension of the foot.
The phenomenon of Shin investigated lies back up, Shin passively bends and short time remain in this position; when you release it straight enough and does not provide the energetic extension of bestowal, which is typical for standards and particularly to the pyramid spastic hypertonia. The same phenomenon is observed in the flexor tendons of the forearm.
Other designations for this kind of phenomena - fixing rigidity, adaptation rigidity. Essentially increase the tone when extrapyramidal rigidity can be largely reduced to improve postural reflexes. As a result of these reflexes muscle continuously strives to keep the state of shortening or lengthening in which it is at every moment of passive movement.