Mahendra Pratap Singh Tomar
@svvu.edu.in/college5
Assistant Professor-Veterinary Anatomy
Sri Venkateswara Veterinary University
RESEARCH INTERESTS
Comparative Anatomy, Developmental Anatomy
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Abhinov Verma, Mahendra P.S. Tomar, and Vikas Sachan
Wiley
Mahendra Pratap Singh Tomar and Neelam Bansal
PeerJ
Background The orbital glands, viz. lacrimal gland, superficial and deep gland of third eyelid (LG, SGT and HG), are important for normal eye functions. These glands have different functions in various animals. The information about the enzyme histochemical nature of prenatal orbital glands in Indian buffalo seems to be unavailable. Therefore, the study was planned on orbital glands of six full term recently died fetuses from animals with dystocia. Methods The frozen sections of all these glands were subjected to standard localization protocols for Alkaline Phosphatase (AKPase), Glucose 6 phosphatase (G-6-Pase), Lactate dehydrogenase (LDH), Succinate dehydrogenase (SDH), Glucose 6 phosphate dehydrogenase (G-6-PD), Nicotinamide Adenine Dinucleotide Hydrogen Diaphorase (NADHD), Nicotinamide Adenine Dinucleotide Phosphate Hydrogen diaphorase (NADPHD), Dihydroxy phenylalanine oxidase (DOPA-O), Tyrosinase, non-specific esterase (NSE) and Carbonic anhydrase (CAse). Results The results revealed a mixed spectrum of reaction for the above enzymes in LG, SGT and HG which ranged from moderate (for LDH in SGT) to intense (for most of the enzymes in all three glands). However, DOPA-O, Tyrosinase and CAse did not show any reaction. From the present study, it can be postulated that the orbital glands of fetus have a high activity of metabolism as it has many developmental and functional activities which were mediated with the higher activity of the enzymes involved.
V. Sundaram, K. Jones, N. Mootoo and M. P. S. Tomar
The axial skeleton of orange rumped agouti, Dasyprocta leporina, was studied for better understanding of its locomotor behaviour. The bones from eight adult agoutis of both sexes were observed for their anatomical features and functional significance. The vertebral formula was found to be C7T12L7S5Cy5–6. The well‐developed occipital crest, caudally oriented prominent axis spine and well‐developed transverse processes from C3–C7 indicated a highly flexible neck with greater sagittal mobility. Articular facets were horizontal in anterior series while oblique in the posterior series, which enabled them to perform both lateral and sagittal movements during locomotion. The caudally directed thoracic spines, T12 as anticlinal vertebra and prominent mamillary process in the posterior series were suggestive of strong dorso‐ventral flexion/extension and rotation. The robust lumbar vertebrae, well‐developed transverse processes with cranio‐ventral extension, were the feature for powerful sagittal/dorsoventral movement. The presence of spinous processes and well‐developed transverse processes in all caudal vertebrae was an indication of a highly movable tail. The ribs were 13 pairs with first seven as sternal and six as asternal. They were laterally compressed in the anterior series as a cursorial adaptation. A strong muscular attachment to vertebrae provides this rodent speed, agility, dexterity and strength suitable for survival in food chain.
Mahendra Pratap Singh Tomar and Neelam Bansal
Wiley
The development of retina in Indian buffalo (Bubalus bubalis) has not been reported previously. The aim of the present study was therefore to report the major landmarks and the time course in the development of retina. Serial histological sections of Indian buffalo embryos and foetuses were used as group1 (<20.0 cm CVRL), group2 (>20.0 but <40.0 cm CVRL) and group3 (>40.0 cm CVRL). Age estimation was made on the basis of crown vertebral‐rump length (CVRL), which ranged between 36 and 286 days (1.6–94.0 cm). The retina in Indian buffalo was developed in a similar manner to that of the other mammals with the principal differences in the time of occurrence of various layers of this nervous tunic. In 36 days (1.6 cm stage), the foetal retina was composed of pigmented layer and the layer of neuroblasts. Differentiation of layers was first observed in 47 days (4.0 cm CVRL) which became prominent in 52 days (5.1 cm stage). At 120 days (20.5 cm stage), the differentiation of inner plexiform layer and inner nuclear layer was evident. At 143 days (31.0 cm) foetal age, the faint line in neuroblastic layer was the first evidence of the future outer plexiform layer. In foetuses of group III, the retina was comprised of all 10 layers (eight cell layers and two membranes) viz. pigmented epithelium, layer of rods and cones, outer limiting membrane, outer nuclear layer, outer plexiform layer, inner nuclear layer, inner plexiform layer, ganglion cell layer, layer of nerve fibres and the inner limiting membrane.
M.P.S. Tomar, J.S. Taluja, Rakhi Vaish, A.B. Shrivastav, Apra Shahi, and Deepak Sumbria
Agricultural Research Communication Center
The present study was conducted on the scapula of five adult tigers to record the characteristic features of scapula bone. It was placed on lateral aspect of thorax, directed downward and forward. It was in the form of wide plate having scapular spine on lateral aspect. The height of spine increased gradually towards the distal end. The acromian process was subdivided into hamate process and suprahamate process. Hamate process overhanged the glenoid cavity. The suprahamate process was in the form of thin triangular plate directed backwards. The supraspinous fossa presented undulating surface in its middle. The infraspinous fossa was triangular and more or less flattened. Subscapular fossa was shallow and presented two prominent ridges. The caudal angle of the scapula was terminated in to glenoid cavity which was oval to quadrangular in shape. Cranial and proximal to the glenoid cavity prominent supraglenoid tubercle was observed which had hook shaped coracoid process. Scapula of both the sides were morphologically similar but the morphometrical values for the right scapula were non-significantly higher than the left counterpart (t less than 0.05), which may be of some biomechanical importance.
Tomar MPS, Vaish Rakhi, Parmar MK, and Shrivastav Yogita
ScopeMed
The sternum of an adult Pariah kite (Milvus migrans) was studied for its gross morphometry. It was procured from Department of Wildlife Health and Management. The sternum of Pariah Kite was in the form of quadrilateral plate with dorsal, concave surface and ventral, convex surface. It formed the thoracic floor and was directed backwards and downwards in an oblique manner. The length and width of sternum were 6.00 cm and 4.20 cm., respectively. Ventral projection, the carina was in the form of thin curved plate, the height of which decreased from before backwards. It was 6.00 cm long, 1.30cm wide and 0.30cm thick (at anterior end). Anterior border was triangular and had an elongated facet on either side for articulation with distal extremity of the coracoids. The caudolateral angles were prominent. At
M.P.S. Tomar, Rakhi Vaish, Nidhi Rajput, and A.B. Shrivastav
Medwell Publications