11.03.2017 Views

DR Medhat MRCP

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

• Pathway of light reflex :<br />

- Stimulus : exposure of eye to light.<br />

- Afferent fibers : optic nerve optic chiasma optic tract .<br />

- Center : pretectal nucleus in the midbrain (on both sides).<br />

- Efferent fibers : Cr3 fibers t relay in ciliary ganglia on both sides<br />

postganglionic short ciliary nerve to constrictor papillae ms miosis.<br />

- Lost in : any optic pathway lesion except optic radiation or visual cortex.<br />

22

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!