Anatomical and histological study of the optic tectum in diurnal raptor speciesbuteo buteo (Buzzard)‎

Abstract AR

Morphological and histological aspects on the optic tectum of (Buzzard) were studied to describe the size, position and the strurtural variation that related to bird behavior and function.

The results of morphological aspects revealed that the optic tectum was large and thick.

Its position was lateral and below the cerebral hemisphere.

Histological aspects of this organ was studied with the using of rotary microtome and slides stained with Haematoxyline and Eosin (H&E) and periodic acid schift reagent (PAS) methods .

The results of microscopic examination indicated that optic tectum was divided in to : Superficial layers which constitutes the stratum opticum (SO) and Deep layers which constitutes the stratum griseumcentrale (SGC) the stratum album centrale (SAC) and the stratum griseumperiventriculare (SGP).

The majority population of neurons especially of different sizesfound in the stratum griseumcentrale (SGC).

Optic fibers were displayed different patterns and orientations in various rectum.