Unique formation of sciatic nerve below the piriformis muscle - a case report.
نویسندگان
چکیده
Dorsal and ventral divisions of ventral rami of lower lumbar and sacral spinal nerve were found to pass ventral and dorsal to the piriformis muscle respectively. These divisions joined each other below the piriformis muscle to form sciatic nerve. This low formation of sciatic nerve was observed in distal part of left gluteal region of a 50-year-old male cadaver. The sciatic nerve thus formed passed caudally into back of thigh and divided into tibial and common peroneal nerves in the upper part of popliteal fossa. In addition, a communicating nerve from the sciatic nerve was found to join the common peroneal nerve in the popliteal fossa. Such variations may lead to piriformis syndrome or non-discogenic sciatica.
منابع مشابه
A Rare Anatomical Variation of Sciatic Nerve and its Relationship with Piriformis Muscle
Sciatic nerve is the thickest nerve of the body which is formed by ventral branches of L4, L5, S1, S2 and S3 of spinal nerves as a part of sacral plexus in pelvis. It leaves the pelvis via the greater sciatic foramen below piriformis muscle and descends between the greater trochanter and ischial tuberosity, along the back of the thigh and dividing into the tibial and common peroneal (fibular) n...
متن کاملReport of a Novel Bilateral Variation of Sciatic and Inferior Gluteal Nerve
Sciatic nerve is the thickest nerve of the sacral plexus, which innervates many muscles and vast areas of the skin of the lower limb. It leaves the pelvis via the greater sciatic foramen, emerges into the gluteal region by passing under the piriformis muscle, and descends beneath the gluteus maximus to divide into its terminal branches: tibial and common peroneal nerve at the superior angle of ...
متن کاملگزارش یک مورد واریاسیون نادر عصب سیاتیک
Sciatic nerve, as the largest branch of the sacral plexus and the thickest nerve of the body, forms from the ::::union:::: of ventral branches of L4-S3. Then it leaves the pelvis via the greater sciatic foramen below the piriformis and descends between the greater trochanter and ischial tuberosity. Afterwards, it divides into the tibial and the common proneal nerves, most frequently at the leve...
متن کاملNon-formation of the Main Trunk of the Sciatic Nerve and Unusual Relationships to the Piriformis Muscle
Background: The sciatic nerve is the largest branch of the sacral plexus. Variations of its origin, exit from the pelvis, emergence and branching in the posterior region of the thigh, especially in regards to the piriformis muscle, are an object of interest due to the possibility to be involved in the pathogenensis of clinically significant non-discogenic sciatica or piriformis syndrome. Case r...
متن کاملگزارش واریاسیون عصبی در ناحیه گلوتئال
Received: 31 Dec, 2008 Accepted: 22 July, 2009 Abstract The sciatic nerve, posterior cutaneus nerve of thigh, and inferior gluteal nerve are branches of sacral plexus. They leave the pelvis via greater sciatic foramen and arises in gluteal region in infra piriformis fossa. The sciatic nerve usually divides at the upper angle of the popliteal fossa to common peroneal and tibial nerves. The...
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ورودعنوان ژورنال:
- Journal of clinical and diagnostic research : JCDR
دوره 8 1 شماره
صفحات -
تاریخ انتشار 2014