Abstract :
Hippocampus, a dorsomedial part of forebrain present at the periphery of telencephalon as a narrow strip is included in the limbic system and is known to perform diverse functions such as food storing behavior, memorizing ability and sexual discrimination. Hippocampal region in birds comprises of five regions: Lateral hippocampus (HCl), Parahippocampal area (APH), Central field of Parahippocampus (PHc), medial hippocampus (HCm) and crescent field (CF). HCm is the outer peripheral region close to pia divided in three layer-suprapyramidal, pyramidal and infrapyramidal. Multipolar is the main subtype of neuron of HCm region. Various studies have been performed on Jay species of birds but on Indian jay species the findings remain limited therefore, it has been attempted in the present investigation to study the diversity of neurons in HCm region of Indian Blue jay. The neuronal characteristics and spine density have also been taken into account. During the study it was observed that Pyramidal neurons had better dendritic field and axonal length. Multipolar neurons had greater soma size (diameter) and spine density in comparison to other neuronal types. Multipolar and pyramidal neurons were observed to be prominent in distribution while bitufted neurons were observed to be in least count during the study.
Keyword :
Coracias benghalensis, Multipolar neurons, Soma diameter, Dendritic field