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stabilizes vertebrae in local movements of vertebral column: 2 1 multifidus thoracis Torso, Back, right/left sacrum, erector spinae aponeurosis, PSIS, and iliac crest: spinous process: posterior branch of spinal nerve: stabilizes vertebrae in local movements of vertebral column: 2 1 multifidus colli Torso, Back, right/left
Each vertebra (pl.: vertebrae) is an irregular bone with a complex structure composed of bone and some hyaline cartilage, that make up the vertebral column or spine, of vertebrates. The proportions of the vertebrae differ according to their spinal segment and the particular species.
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This is a list of human anatomy mnemonics, categorized and alphabetized.For mnemonics in other medical specialties, see this list of medical mnemonics.Mnemonics serve as a systematic method for remembrance of functionally or systemically related items within regions of larger fields of study, such as those found in the study of specific areas of human anatomy, such as the bones in the hand ...
They are located in the cervical region of the vertebral column from C3 to C7. [3] Two lips project upward from the superior surface of the vertebral body below, and one projects downward from the inferior surface of vertebral body above. They allow for flexion and extension and limit lateral flexion in the cervical spine.
The vertebral column usually contains 54 bones: 7 cervical vertebrae, including the atlas (C1) and axis (C2) which support and help move the skull, 18 (or rarely, 19) thoracic, [2] 5-6 lumbar, 5 sacral (which fuse together to form the sacrum), and 15-25 caudal [2] vertebrae with an average of 18. Differences in number may occur, particularly in ...
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The difference in vertebra number results in a greater range of movement for humans with less thoracic vertebrae than gorillas with more lumbar vertebrae. Au. afarensis has six total lumbar vertebrae with also twelve thoracic vertebra [ 12 ] Another key characteristic that enforced upright posture in hominin was the shape of the lumbar vertebra.