Extrapyramidal tracts and disorders

EXTRAPYRAMIDAL TRACTS BY:- DR. PRIYANKA GUPTA (B.P.T)

DEFINATION ,[object Object],[object Object],[object Object]

TYPES ,[object Object],[object Object],[object Object],[object Object],[object Object]

Function of extrapyramidal tract ,[object Object],[object Object],[object Object],[object Object],[object Object]

RED NUCLEUS ,[object Object],[object Object]

1.RUBROSPINAL TRACT ,[object Object],Cross to opposite side(forel’s decussation) ventral to sylvian duct Descends down through brainstem

[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object]

2. RETICULOSPINAL TRACT ,[object Object],[object Object],[object Object]

a) Medial reticulospinal fibres (pontine reticular tract) ,[object Object],Run ipsilaterally through longitudinal fasciculus Medial part of Anterior funiculus of sc Terminates ipsilaterally at all spinal levels

b)Lateral reticulospinal fibres (medularry reticulospinal tract) ,[object Object],[object Object],[object Object],[object Object]

Functions:- ,[object Object],2. Facilitates and inhibits voluntary movement, influences muscle tone. 3. Mediates autonomic functions 4. Modulates pain impulses 5. Influences blood flow to lateral geniculate

6. The MRST is responsible for exciting anti-gravity, extensor muscles . 7. The LRST is responsible for the inhibiting excitatory axial extensor muscles of movement .

functions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

OLIVOSPINAL TRACT ,[object Object],[object Object],Arise from inferior olivary nucleus Enter ant. Part of lateral white funiculus Terminate in an. Horn cells of sc ,[object Object],[object Object]

TECTOSPINAL TRACT ,[object Object],Superior colliculus of midbrain ,[object Object],Fibre descend to anterior white funiculus ,[object Object],[object Object]

Vestibulospinal tracts ,[object Object],[object Object],[object Object]

a) Anterior vestibulospinal tract. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

b) Lateral vestibulospinal tract ,[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object]

Extrapyramidal disorders ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

parkinsonism ,[object Object],[object Object]

chorea ,[object Object],[object Object],[object Object]

athetosis ,[object Object],[object Object]

dystonia ,[object Object],[object Object],[object Object]

Tardive dyskinesia ,[object Object],[object Object]

Extrapyramidal tracts and disorders

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