What do you mean by synsacrum?
: a solidly fused series of vertebrae in the pelvic region in birds, dinosaurs, and pterosaurs comprising usually the last rib-bearing or thoracic vertebra, the two sacral vertebrae, and a varying number of caudal vertebrae — compare sacrum.
What is a synsacrum What is its function?
The synsacrum is a unit formed by the fusion of the posterior thoracic, lumbar, and sacral vertebrae. Fusions of these bones make birds sturdy and indirectly lighter by decreasing the number of muscles necessary to control individual vertebrae.
Where is synsacrum found?
Normal Anatomy Depending on the species, there may be consolidation of a series of cranial vertebrae, termed the notarium, or fusion of a series of caudal vertebrae, termed the synsacrum, which is a fusiform structure located on the underside of the pelvis.
What is the name of the fused caudal Coccygeal vertebrae?
The coccyx, commonly known as the tailbone, is below the sacrum. Individually, the sacrum and coccyx are composed of smaller bones that fuse (grow into a solid bone mass) together by age 30. The sacrum is made up of 5 fused vertebrae (S1-S5) and 3 to 5 small bones fuse creating the coccyx.
How is Synsacrum formed?
It is called Synsacrum. It is formed by the fusion of 14 to 16 vertebrae. Those vertebrae are one last thorasic vertebra, Six lumbar vertebrae, two sacral vertebrae and seven candal vertebrae. The centrum of the sacral vertebrae are fused together and their transverse processes are also united to form bony plates.
What is the function of a Pygostyle?
Normal Anatomy The pygostyle is an important structure that serves to mount the tail feathers, providing critical control surfaces, especially during takeoff and landing.
What is the Synsacrum made of?
noun, plural syn·sac·ra [sin-sak-ruh, -sey-kruh]. Ornithology. a dorsal ridge of bone in the pelvic region of birds, formed by the fusion of certain thoracic, lumbar, sacral, and caudal vertebrae.
What is the function of the coccygeal?
Despite its small size, the coccyx has several important functions. Along with being the insertion site for multiple muscles, ligaments, and tendons, it also serves as one leg of the tripod—along with the ischial tuberosities—that provides weight-bearing support to a person in the seated position.
Is caudal the same as coccygeal?
The coccyx, or tailbone, is both the smallest and the most inferior bone in the spinal column. It is a vestige of the caudal vertebrae found in the tails of most mammals.
What is a Pygostyle in birds?
1 : a plate of bone that forms the posterior end of the vertebral column in most birds and is formed by the union of vertebrae.
Do humans have pygostyle?
The head of both birds and humans is protected by a large cranium and in the facial bones, the upper jaw of the human, and the upper beak of the bird are both composed of a bone called the maxilla. At the base of a bird’s spine several vertebrae are fused to form a bone called the pygostyle which humans do not possess.
Which is the best definition of a synsacrum?
Definition of synsacrum. : a solidly fused series of vertebrae in the pelvic region in birds, dinosaurs, and pterosaurs comprising usually the last rib-bearing or thoracic vertebra, the two sacral vertebrae, and a varying number of caudal vertebrae — compare sacrum.
What are the different meanings of the word autonomy?
Feinberg has claimed that there are at least four different meanings of “autonomy” in moral and political philosophy: the capacity to govern oneself, the actual condition of self-government, a personal ideal, and a set of rights expressive of one’s sovereignty over oneself (Feinberg 1989).
What does it mean to be an autonomous person?
Put most simply, to be autonomous is to be one’s own person, to be directed by considerations, desires, conditions, and characteristics that are not simply imposed externally upon one, but are part of what can somehow be considered one’s authentic self. Autonomy in this sense seems an irrefutable value,…
What does it mean when a child lacks autonomy?
Lacking autonomy, as young children do, is a condition which allows or invites sympathy, care, paternalism and possibly pity.