A sample of late Visean limestone from the Wlodawa IG-4 borehole, east Lublin, Poland, yielded a piece tooth and few hundred well-preserved scales comparable to those “Ctenacanthus” costellatus Traquair, 1884 Glencartholm, Scotland, UK. Most are typical compound body ctenacanthid type. Their crowns composed several separate odontodes whose distal ends turned backwards bases characterised by con...

In this paper a method is proposed to recover and interpret the 3D body structures of a person from a single view, provided that (1) at least six feature points on the head and a set of body joints are available on the image plane, and (2) the geometry of head and lengths of body segments formed by joints are known. First of all, the feature points on the head in the head-centered coordinate sy...

What is head stabilization in birds? When the body of a bird is held in the hand and rotated or moved in different directions the head often appears ‘locked in space’ or glued to the spot, and does not move with the rest of the body. To maintain this stable position the bird has, of course, to make complex compensatory movements of the neck. This can be seen clearly in chickens, pigeons, owls a...

Movement-related activity within the superior colliculus (SC) represents the desired displacement of an impending gaze shift. This representation must ultimately be transformed into position-based reference frames appropriate for coordinated eye-head gaze shifts. Parietal areas that project to the SC are modulated by the initial position of both the eye-re-head and head-re-body and SC activity ...

Flies have a distinct body posture during walking and flight. Hence head and eyes have mostly a preferred alignment with the surroundings. Voluntary and involuntary changes of body orientation elicit compensatory head turns which stabilize the original, correct orientation of the eyes relative to the surroundings. Compensatory head turns are elicited by several sensory cues which simultaneously...

Introduction: Using backpacks has arisen complaints regarding musculoskeletal pains among students. The aim of this study is to investigate the relationship between demographic information and bag weight with Neck Disability Index (NDI), angles and head and neck postures among students. Material and Methods: This descriptive-analytical and cross-sectional study was conducted among 80 students ...

osteoma is a benign, slow-growing osteogenic tumor that sometimes arises from the craniomaxillofacial region, such as the sinus, temporal or jaw bones. osteoma consists of compact or cancellous bone that may be peripheral, central or extraskeletal type. peripheral osteoma arises from the periosteum and is commonly a unilateral, pedunculated mushroom-like mass. peripheral osteoma of the mandible...

introduction: foreign body ingestion is common among children and more common in boys and in children under the age of 3. it can present with a wide variety of symptoms like dysphagia and drooling or symptoms related to the upper aerodigestive tract.   case report: a 20-month-old male presented with refractory croup and poor feeding since 2 weeks. bronchoscopy and esophagoscopy was performed du...