Control of posture and movement Done by Mohamed
Control of posture and movement Done by : Mohamed Faleh Al-Jathlani 430106683
Descending motor pathways * Pyramidal tract ( Medullary pyramids ) * Extrapyramidal tract ( other central )
Extrapyramidal tracts 1 - Rubrospinal tract Stimulation ( Red nucleus ) Inhibition (+ Flexor ) ( - Extensor ) 2 -Pontine reticulospinal tract ( Pons ) Extensor) ) 3 -Medullary reticulosoinal tract ( medullary reticular ) (+ Flexor ) ( ++ (- Flexor) (- - Extensor
4 -Lateral vestibulospinal tract Flexor) (Lateral vestibular nucleus) Extensor) ((+ 5 -Tectospinal (Control of neck muscles ) (superior colliculus )
Decerebrate Rigidity * Lesion of brain stem above pontine reticular and lateral vestibular nucleus but below midbrain cause Decerebrate Rigidity *( lesion above midbrain do not cause Decerebrate Rigidtiy )
Cerebellum or ( little brain ) * Regulates movement and posture * Play role in certain kind of motor learning * Control Rate, range, force and direction of movement ( Synergy ) “ Damage of cerebellum cause coordination of movement "
Divisions of cerebellum 1 - Vestibulocerebellum : Control balance and eye movement 2 - Spinocerebellum : Control synergy of movement 3 - pontocerebellum : Controls the planning and initiations of movement
Basal ganglia As a function of basal ganglia the role of basal ganglia is to aid or support in planning and execution of smooth movements * Parkinson disease ( Slow and delay of movement )
Motor cortex Voluntary movement are directed by the motor cortex , and its consist of three areas : 1 and 2 - ( area 6 ) premotor cortex and supplementary motor cortex : Generating a plan of movement. 3 - ( area 4 ) primary motor cortex Execution of movement.
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