Ansa Cervicalis Nerve: Review of the Topographic Anatomy and Morphology

Chhetri, Dinesh K.; Berke, Gerald S.

doi:10.1097/00005537-199710000-00014

Cited by 84 publications

(67 citation statements)

References 19 publications

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“…Following formation of the loop, the nerve branches innervate the sternohyoid and sternothyroid. The common ANSA branch is approximately 4.3 cm long and 0.9 mm wide, making it a good anatomic fit in length and diameter for anastamosis to the RLN [32]. In the past, the nerve branch to the sternothyroid or common branch was used with good surgical outcome [12].…”

Section: Anatomymentioning

confidence: 99%

Optimal Management of Acute Recurrent Laryngeal Nerve Injury During Thyroidectomy

Isseroff

Pitman

2013

Curr Otorhinolaryngol Rep

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Recurrent laryngeal nerve (RLN) injury is commonly encountered by thyroid surgeons and may carry with it great morbidity. Whether the injury is accidental or due to deliberate resection for oncologic soundness, the surgeon must be prepared to offer the best available treatment to patients, either at the time of injury or early in the recovery process. We review advances in treatment that allow optimal management of an acute RLN injury: ansa cervicalis-RLN reinnervation, in-office unsedated vocal fold injection augmentation, and electromyographic prognostication. The benefits and advantages of each procedure as well as relevant anatomy and techniques are delineated.

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Section: Anatomymentioning

confidence: 99%

Optimal Management of Acute Recurrent Laryngeal Nerve Injury During Thyroidectomy

Isseroff

Pitman

2013

Curr Otorhinolaryngol Rep

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“…Classically, the ansa cervicalis (AC) has been defined as a simple yet complicated loop, which has superior and inferior roots that join anterior to the carotid sheath (Chhetri & Berke, 1997). It has been previously established that the original latin term "ansa" (meaning "handle of cup or shaft") was initially used to describe the looped portion of the AC; however recent literature has defined it as encompassing both the superior and inferior roots (Banneheka, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…There have been reports of the complexity of the formation of the AC and its varying course along the common carotid artery and IJV (Chhetri & Berke, 1997). Yamada & Mannen (1965) classified the relationship of the AC to the IJV as either belonging to lateral or medial categories.…”

Section: Introductionmentioning

confidence: 99%

The Ansa Cervicalis in Fetuses

et al. 2012

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SUMMARY:The formation of ansa cervicalis (AC) is somewhat complex with both its course and location along the common carotid artery and internal jugular vein (IJV) varying. The aim of the study was to document the anatomy, formation and variations of AC. Forty fetuses (gestational age: 15 to 28 weeks) were obtained from the Department of Clinical Anatomy, Westville Campus, UKZN. A detailed micro-dissection of the posterior triangle of the neck and AC were completed using standard micro-dissecting instruments. Results of the formation of AC, its relationship to IJV and variations were recorded. The superior root was identified as a long willowy nerve that branched from the hypoglossal nerve, descended on the carotid sheath, anterior to the common carotid artery and IJV in 70 % and posterior to IJV in 30 % of the specimens. The inferior root of AC originated from the ventral rami of C2-C3 in 26%; ventral ramus of C3 in 58% and ventral ramus of C2 in 16%. Variations: a) Formation: (i) Dual formation of AC: The Hypoglossal nerve formed separate loops with the ventral rami of C2 and C3 (3%); (ii) "W" shaped appearance of AC above the superior belly of omohyoid (1%); (iii) A "vago-cervical complex" 3%; b) Origin and course: The superior root of AC received a contribution from the hypoglossal nerve, a short distance later it formed a loop around the IJV to ascend to the ventral ramus of C2 as the inferior root. The precise understanding of the anatomy of AC together with variations may assist anesthetists and surgeons to accurately identify the vascular and neural relations during surgical procedures.

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“…In the past few years ansa cervcalis has been utilized to innervate the muscles of larynx paralyzed due to surgical procedures performed in the neck by nerve implantation or neuromuscular transfer (Tucker, 1979;Liang, 1993;Nasri et al, 1994). Ansa cervicalis is used for nerve anastamosis with the recurrent laryngeal nerve due to its proximity to the larynx, as a neuromuscular pedicle (Chhetri & Berke 1997;Vollala et al, 2005;Rao et al, 2007). Good knowledge of topographical relationships of structures in the neck and their variations is one of the key prerequisites for successful surgery.…”

Section: Introductionmentioning

confidence: 99%

Variant Inferior Root of Ansa Cervicalis

Babu

2011

Int. J. Morphol.

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SUMMARY: Ansa cervicalis is a loop of nerves found in the anterior wall of the carotid sheath in the carotid triangle of neck innervating infrahyoid muscles. Its superior root has fibres from the first cervical nerve that leaves the hypoglossal nerve and joins the inferior root formed by the branches from the second and third cervical nerves. The two roots join to form ansa cervicalis. The ansa cervicalis nerve formation is relatively complex, as its course and location along the great vessels of the neck vary. In the present case on the left side of an adult male cadaver the inferior root was absent and the contributions from C2 and C3 were joining independently with the superior root of ansa to form ansa cervicalis. However no such variation was found in the ansa cervicalis formation on the right side.

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Ansa Cervicalis Nerve: Review of the Topographic Anatomy and Morphology

Cited by 84 publications

References 19 publications

Optimal Management of Acute Recurrent Laryngeal Nerve Injury During Thyroidectomy

Optimal Management of Acute Recurrent Laryngeal Nerve Injury During Thyroidectomy

The Ansa Cervicalis in Fetuses

Variant Inferior Root of Ansa Cervicalis

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