The document discusses the occipital lobe of the brain, highlighting its role in vision and detailing its structure, including gyri and sulci. It describes the primary and secondary visual areas, their locations, functions, and associated lesions. Additionally, it contrasts the functions of the occipital eye field with the frontal eye field.

1. MEHWISH ASLAM RAHEEMI
OCCIPITAL LOBE
Posterior most of the brain lobes,
associated primarily with vision.

3. GYRI & SULCI
1)No distinguishable gyri.
2)Sulci present.i.e Parieto-occipital sulcus separating the
occipital lobe from parietal lobe and the calcarine sulcus
(medial surface) extending from the posterior part of corpus
callosum up to the occipital pole.
3)Parieto-occipital sulcus makes an acute angle with the
calcarine sulcus.

5. AREAS
•PRIMARY VISUAL AREA
•SECONDARY VISUAL AREA

6. PRIMARY VISUAL AREA
• Location: Posterior walls of Calcarine sulcus.
• Morphology: Thin cortex with striations seen by the naked eye .
Hence, Striated Cortex.
• Function: Associated with afferent visual fibers from the ipsilateral
temporal fibers and contralateral nasal fibers through the lateral
geniculate body to the PVA.
• Defect/Lesion: Leads to crossed homonymous hemaniopia.

9. SECONDARY VISUAL CORTEX
• Location: around the Primary visual cortex
medially and laterally.
• Function: Associates vision with past experience .
Helps in Appreciation & Recognition.
• Defect/Lesion : Disability to recognize Objects.

11. OCCIPITAL EYEFIELD
• Depends on stimulus.
• Involuntary.
• Reflex tracking movement
• Difference b/w Frontal & Occipital eye field: The formal is
independent of stimulus , voluntary scanning movement.

13. THANK YOU!