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The most significant impact of magnetic resonance neurography is on the evaluation of the large proximal nerve elements such as the brachial plexus (the nerves between the cervical spine and the underarm that innervate shoulder, arm and hand), [9] the lumbosacral plexus (nerves between the lumbosacral spine and legs), the sciatic nerve in the pelvis, [10] as well as other nerves such as the ...
In human anatomy, the sacral plexus is a nerve plexus which provides motor and sensory nerves for the posterior thigh, most of the lower leg and foot, and part of the pelvis. It is part of the lumbosacral plexus and emerges from the lumbar vertebrae and sacral vertebrae (L4-S4). [ 1 ]
The more common source of lumbar plexopathy is a direct or secondary [2] tumor involvement of the plexus with MRI being the typical confirmation tool. [15] Tumors typically present with enhancement of nerve roots and T2-weighted hyperintensity. [ 2 ]
The anterior divisions of the lumbar nerves, sacral nerves, and coccygeal nerve form the lumbosacral plexus, the first lumbar nerve being frequently joined by a branch from the twelfth thoracic. For descriptive purposes this plexus is usually divided into three parts:
In particular, endoscopic surgery gave much better access to the pudendal nerve as well as the sciatic nerve, and allowed the possibility of decompressing the sacral plexus. [ 18 ] [ 16 ] [ 30 ] The use of image-guided diagnostic nerve blocks provided better capabilities to identify the entrapped nerve as well as the site of entrapment, leading ...
If plexopathy is suspected after imaging, an EMG performed by a neurologist or physiatrist can help confirm a plexopathy, and clarify the localization within the brachial or lumbosacral plexus. Following electrodiagnostic testing, further imaging may be obtained of relevant soft tissue structures with either ultrasound or MRI.
The sacral plexus is formed anterior to the piriformis muscle and gives rise to the sciatic nerve, the superior and inferior gluteal nerves, and the pudendal and posterior femoral cutaneous nerves. [3] However, most of the sacral plexus nerves are scarcely recognizable, because they leave the pelvis through the greater sciatic foramen. From the ...
Imaging, such as magnetic resonance imaging, can be used to rule out other pathologies. In many cases, this diagnosis is made after treatment of more common pathologies with similar symptoms. The most common overlapping pathologies include facet joint pain, sacroiliac joint dysfunction, and lumbosacral radiculopathy.