Search results
Results from the WOW.Com Content Network
The coccyx (pl.: coccyges or coccyxes), commonly referred to as the tailbone, is the final segment of the vertebral column in all apes, [1] and analogous structures in certain other mammals such as horses. In tailless primates (e.g. humans and other great apes) since Nacholapithecus (a Miocene hominoid), [2] [3] the coccyx is the remnant of a ...
The number of vertebrae in a region can vary but overall the number remains the same. In a human spinal column, there are normally 33 vertebrae. [3] The upper 24 pre-sacral vertebrae are articulating and separated from each other by intervertebral discs, and the lower nine are fused in adults, five in the sacrum and four in the coccyx, or tailbone.
The anococcygeal nerve is a sensory nerve of the pelvis [1] that arises from the coccygeal plexus. [2] It pierces the coccygeus muscle and the sacrotuberous ligament to supply a small area of skin between the coccyx and anus, [3] as well as the sacrococcygeal joint.
It stretches from median sacral crest [3] and the free margin of the sacral hiatus [1] to the dorsal surface of the coccyx. [ 1 ] The lateral sacrococcygeal ligaments run from the lower lateral angles of the sacrum to the transverse processes of the first coccygeal vertebra to complete the foramina for the last sacral nerve . [ 1 ]
coccyx and anococcygeal raphe: inferior gluteal artery: levator ani nerve inferior rectal nerve from pudendal nerve (S3, S4) coccygeal plexus; supports organs in pelvic cavity: 2 1 pubococcygeus: Torso, Pelvis, Levator ani: back surface of pubis, anterior part of obturator fascia: coccyx and sacrum: inferior gluteal artery: levator ani nerve
The vertebral column, also known as the spinal column, spine or backbone, is the core part of the axial skeleton in vertebrate animals.The vertebral column is the defining and eponymous characteristic of the vertebrate endoskeleton, where the notochord (an elastic collagen-wrapped glycoprotein rod) found in all chordates has been replaced by a segmented series of mineralized irregular bones ...
The tailbone, at the end of the spine, has lost its original function in assisting balance and mobility, though it still serves some secondary functions, such as being an attachment point for muscles, which explains why it has not degraded further. In rare cases, congenital defect results in a short tail-like structure being present at birth ...
The anococcygeal body (anococcygeal ligament or anococcygeal raphe) is a fibrous median raphe in the floor of the pelvis, which extends between the coccyx and the margin of the anus. It is composed of fibers of the levator ani muscle that unite with the muscle of the opposite side, muscle fibres from external anal sphincter , and fibrous ...