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Hemivertebrae are wedge-shaped vertebrae and therefore can cause an angle in the spine (such as kyphosis, scoliosis, and lordosis). Among the congenital vertebral anomalies, hemivertebrae are the most likely to cause neurologic problems. [5] The most common location is the midthoracic vertebrae, especially the eighth (T8). [6]
[1] [5] The segmentation pattern observed in the spinal nerves is in fact governed by the somatic mesoderm. In the embryonic stages of higher vertebrates including humans, the segmentation of these spinal nerves follows the directions from both the anterior (A, cranial) and posterior (P, caudal) sections of the somite mesoderm.
Test rotation of the thoracic and lumbar spine. Gently hold the patient's hips still and ask them to: "Turn your shoulders round as far as you can to the left, then do the same to the right." Test lateral flexion of the thoracic and lumbar spine: "Stand up straight and then slide the palm of your right hand down your thigh towards your knee ...
The three categories treated for types of spinal cord deficiencies are massive fusion of the cervical spine (Type I), the fusion of 1 or 2 vertebrae (Type II), and the presence of thoracic and lumbar spine anomalies in association with type I or type II Klippel–Feil syndrome (Type III). [citation needed]
It is a congenital disorder in which the fetal development of the lower spine—the caudal partition of the spine—is abnormal. [1] It occurs at a rate of approximately one per 60,000 live births. [2] Some babies are born with very small differences compared to typical development, and others have significant changes.
Spondylolisthesis is when one spinal vertebra slips out of place compared to another. [1] While some medical dictionaries define spondylolisthesis specifically as the forward or anterior displacement of a vertebra over the vertebra inferior to it (or the sacrum), [2] [3] it is often defined in medical textbooks as displacement in any direction.
ASIA Impairment Scale for classifying spinal cord injury [14] [17] Grade Muscle function Grade Description 0 No muscle contraction A Complete injury. No motor or sensory function is preserved in the sacral segments S4 or S5. 1 Muscle flickers B Sensory incomplete. Sensory but not motor function is preserved below the level of injury, including ...
A functional spinal unit (FSU), or motion segment, is the smallest physiological motion unit of the spine to exhibit biomechanical [1] characteristics similar to those of the entire spine. [ 2 ] A FSU consists of two adjacent vertebrae , the intervertebral disc and all adjoining ligaments between them and excludes other connecting tissues such ...