Histology of the midbrain of the grey breasted helmeted guinea fowl (Numida meleagris galeata) at post-hatch

Wanmi, N.; Levi, Usendi Ifukibot; Jonah, Gosomji Innocent; Bukar, P. D.

doi:10.5897/jvmah2017.0600

Cited by 2 publications

(2 citation statements)

References 10 publications

(9 reference statements)

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“…Wanmi et al. (2019) reported that the mean weight of the midbrain increased with increase in age, which indicate that the size of optic lobe was also gradually increased in helmeted guinea fowl, in support of the present findings in broiler chickens. Peng et al.…”

Section: Resultssupporting

confidence: 89%

“…The morphological observations of optic lobes in the present study are in consonance with those reported by Husband and Shimizu (1999) in pigeon, Peng et al (2010) and Karkoura et al (2015) in African ostrich, Gupta et al (2016) in Vencobb broiler chicken, Panigrahy et al (2017) in Vanaraja Chicken and Wanmi et al (2018) in wild African parrot. Wanmi et al (2019) reported that the mean weight of the midbrain increased with increase in age, which indicate that the size of optic lobe was also gradually increased in helmeted guinea fowl, in support of the present findings in broiler chickens. Peng et al (2010) observed the average mean length and width of optic lobes to be 14.18 ± 0.02 mm and 12.23 ± 0.011 mm in adult African ostrich, and Karkoura et al (2015) recorded that the optic lobe was about 16.38 mm in length and 8.48 mm in width in African ostrich.…”

Section: Gross Anatomical Observationsupporting

confidence: 91%

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Age‐related anatomical variation and morphometric studies on the optic tectum in post‐hatch broiler chicken

Gautam,

Ray,

Das

et al. 2023

Anat Histol Embryol

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In this investigation the morphological and morphometrical features of the optic tectum in post‐hatch broiler chicken were studied macroscopically and microscopically. The present study was conducted on 70 day old broiler chicks which were reared up to 42 days. The whole experimental period of study was divided into seven groups (from group I to VII) at weekly interval (days 0, 7, 14, 21, 28, 35 and 42). The optic lobes were paired and spherical to oval eminences located on the ventro‐lateral part of the midbrain in broiler chicken. There was significant increase in length and width of the optic lobes with the advancement of age. Histological analysis of optic tectum shows six basic layers from the external surface to internal one towards the optic ventricle. Different layers of optic tectum were identified as stratum opticum, stratum griseum superficial, stratum griseum central, stratum album central, stratum griseum periventriculare and stratum fibrosum periventriculare with several types of neurons. Among all six layers of the optic tectum the stratum griseum superficial layer showed very high degree of secondry differentiation and evolved into nine sub‐ layers in all age groups of broiler chickens. Three main cell types had been identified that is, small to medium sized stellate shaped neuron, pyramidal neuron and fusiform neuron, beside these multipolar neuron were also evident. The thickness of all layers of optic tectum significantly increases with the advancement of age of the birds. The optic ventricle was lined with a layer of cuboidal ependymal cells.

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Section: Resultssupporting

confidence: 89%

Section: Gross Anatomical Observationsupporting

confidence: 91%

Age‐related anatomical variation and morphometric studies on the optic tectum in post‐hatch broiler chicken

Gautam,

Ray,

Das

et al. 2023

Anat Histol Embryol

View full text Add to dashboard Cite

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Brain Gross Anatomy and Cerebellar Histology of the Cattle Egret (Bubulcus ibis)

Azeez,

Omirinde,

Chomo

et al. 2023

Folia Veterinaria

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The structural parts of brain are similar in all vertebrates, but they differ in their complexity and organization. The avian brain for instance, is organised differently compared to mammals, with variations existing in the relative size and location of their structures. The cattle egret (Bubulcus ibis) is a cosmopolitan avian species native to Africa. Despite their economic importance as excellent sentinels in assessing environmental pollutants, there is a dearth of information on their neuroanatomy. Hence, we here investigated their gross morphological features and morphometric parameters, and the cerebellar histology. Twelve transcardi-ally perfused juvenile cattle egrets were studied, with the body and brain weights and brain linear measurements considered. The brain weight constituted 0.46 % of the total body mass, with a strong positive correlation recorded between the body and brain weights (r = 0.9204). Morphologically, the brain was lissencephalic, with the corpus callosum absent and the olfactory bulbs rudimentary with no discernible division into the olfactory bulb, olfactory tract and olfactory lobe. We observed prominent sagittal eminence and vallecula telencephali, as well as an obvious fovea limbica on the dorsal and lateral surfaces of the cerebral hemispheres, respectively. The diencephalic structures were completely covered by telencephalon, with the pineal gland occupying the polygonal space between cerebrum, optic lobe and cerebellum. The mesencephalic tectum appeared as a large oval bilaterally bulging structure with prominent optic tracts and constituted the bulk of the midbrain. There was a dorsal extension of the fourth ventricle into the cerebellum known as the ventriculus cerebelli and the cerebellar histology presented a persistent external granular layering suggestive of a potential for adult neurogenesis. Our data has added relevant literature on the cattle egret brain and could prove useful in comparative, developmental and evolutionary avian neuroanatomy.

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Histology of the midbrain of the grey breasted helmeted guinea fowl (Numida meleagris galeata) at post-hatch

Cited by 2 publications

References 10 publications

Age‐related anatomical variation and morphometric studies on the optic tectum in post‐hatch broiler chicken

Age‐related anatomical variation and morphometric studies on the optic tectum in post‐hatch broiler chicken

Brain Gross Anatomy and Cerebellar Histology of the Cattle Egret (Bubulcus ibis)

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