Vascularisation of the cerebellar nuclei in Akkaraman sheep

WOS: 000187114500001PubMed: 14680055This study reports an anatomical study of the vascular supply in 20 Akkaraman sheep cerebelli from adult subjects of both sexes. The origin and branching pattern of the cerebellar artery vascularising the cerebellar nuclei were studied by gross dissection and vascular injection. Then dissection was performed and vessels nourishing the cerebellar nuclei were documented. Four bilaterally symmetrical cerebellar nuclei were determined as nucleus lateralis cerebelli, nucleus interpositus lateralis cerebelli, and nucleus interpositus medialis cerebelli and nucleus fastigii from lateral to medial side. It has been previously confirmed that vascularisation of the cerebellar nuclei is carried out by intermediary branches of the rostral cerebellar artery and the caudal cerebellar artery. However, this study has confirmed that the caudal cerebellar artery has no contribution in the vascularisation of the cerebellar nuclei

SEM investigation of the avian atrium wall

Dilger, Ryan N./0000-0003-2538-2845WOS: 000222007500006In this study, the atrium wall of the chicken was investigated by Scanning Electron Microscopy (SEM) and routine histology. The wall of the left atrium was thicker and more uniform than that of the right atrium. However, the lumen of the right atrium was more voluminous than that of the left atrium. The average thickness of the pectinate muscles was 0.9 mm on the left atrium while 0.7 mm on the right atrium. The pectinate muscles were connected by the muscle bridges on the left atrium, but not on the right. The depressions on the right atrium wall were well defined and polygonal in shape; however, depressions on the left atrium were not as prominent

Arterial supply of the pineal gland of Akkaraman sheep

WOS: 000223070900001PubMed: 15119782Arterial vascularisation of the ovine pineal gland was investigated by latex injection preparations of the common carotid artery in 20 adult Akkaraman sheep brains under stereo light microscope. It was observed that the arterial supply comes exclusively from branches of the caudal cerebral artery. The pineal gland was found to contain a rich vascular network. This network also received a few branches from the caudal choroid rami

The scanning electron and light microscopic structure of bovine tactile hair

WOS: 000223744300010PubMed: 15352885Bovine tactile hairs in skin samples from the lateral side of the upper lip were examined using scanning electron and light microscopy. The root of these hairs has a variable length and is surrounded by a large sinus located between the internal and the external dermal sheath. With a prominent thickness, the external dermal sheath forms the external wall of the tactile hair and contains many nerves some of which extend into trabeculae. Trabeculae projecting from the internal dermal sheath and attaching to the external dermal sheath with two or more branches are present in the entire sinus. The trabeculae are interconnected by connective tissue sheets that support the integrity of the trabecular organization. The sinus surfaces as well as trabeculae are lined by endothelia. As a result, the bovine tactile hair is truly a cavernous type of tactile hair with a well organized microscopic anatomy. Thus, the bovine tactile hair most likely plays an important role in relatively immobile and insensitive bovine lips

Morphology of the spinal cord in the chicken, duck and pigeon

Orhan, Ismail Onder/0000-0003-3006-4657WOS: 000172885000015The morphology of the spinal cord in 15 chickens. 15 ducks and 15 pigeons obtained from the Ankara region were examined. The spinal cord consisted of 15 cervical, 7 thoracic, 14 lumbosacral and 5 coccygeal segments (a total of 41 segments) in the chickens; 15 cervical, 8 thoracic, 16 lumbosacral and 5 coccygeal segments (a total of 44 segments) in the ducks and 13 cervical. 6 thoracic, 13 lumbosacral and 5 coccygeal segments (a total of 37 segments) in the pigeons. The cervical enlargement was composed of cervical segments 13-15 and thoracic segments 1-2 in the chickens: cervical segments 12-15 and thoracic segments 1-2 in the ducks and, cervical segments 11-13 and thoracic segments 1-2 in the pigeons. The lumbosacral enlargement in the chickens, ducks and pigeons included lumbosacral segments 1-12, 1-15 and 1-12 respectively. The rhomboidal sinus was measured. The central canal in the chickens, ducks and pigeons was located within the glycogen body at the lumbosacral segments 6-10, 5-11 and 2-9 respectively. The range of white matter and grey matter fields in the spinal cord segments was found using transversal sections of the segments schemes in all three species. The comparison of the morphology in segmental examination of the spinal cords was performed in the chicken, duck and pigeon, which belong to different groups of the bird family