Search results
Results from the WOW.Com Content Network
The ansa cervicalis (or ansa hypoglossi in older literature [citation needed]) is a loop formed by muscular branches of the cervical plexus formed by branches of cervical spinal nerves C1-C3. The ansa cervicalis has two roots - a superior root (formed by branch of C1) and an inferior root (formed by union of branches of C2 and C3) - that unite ...
The carotid sheath is a condensation of the deep cervical fascia [1]: 578 enveloping multiple vital neurovascular structures of the neck, [2] including the common and internal carotid arteries, the internal jugular vein, the vagus nerve (CN X), and ansa cervicalis. [1]: 578 [2] The carotid sheath helps protects the structures contained therein. [2]
It is a part of the ansa cervicalis along with the C1 and C3 nerves sometimes forming part of superior root of the ansa cervicalis. [2] it also connects into the inferior root of the ansa cervicalis with the C3. [2] It originates from the spinal column from above the cervical vertebra 2 (C2).
The thyrohyoid branch [1] (also: thyrohyoid branch of ansa cervicalis, [2] or nerve to thyrohyoid (muscle) [2] [3]: 595, 600 ) is a motor branch derived from the cervical plexus [2] [2] [3]: 595, 600 [4]: 457, 709 formed by fibres of (the anterior ramus of [3]: 600 ) the cervical spinal nerve 1 (C1) [3]: 582 [5] [6] [4]: 457, 709 (and - according to some sources - cervical spinal nerve 2 (C2 ...
Sternohyoid, omohyoid, sternothyroid are supplied by ansa cervicalis. Thyrohyoid: by a branch of hypoglossal nerve but the fibres are all 'hitch-hiking' from C1. Development
Superficial to the carotid sheath lies the hypoglossal nerve, and ansa cervicalis of the cervical plexus. The hypoglossal nerve crosses both the internal and external carotids, curving around the origin of the occipital artery. Within the sheath, between the artery and vein, and behind both, is the vagus nerve; behind the sheath, the ...
The omohyoid is innervated by the ansa cervicalis of the cervical plexus. [2] The inferior belly is innervated by the ansa cervicalis itself (which is derived from cervical spinal nerves C1-C3), and the superior belly is innervated by the superior root of ansa cervicalis (which is derived from the first cervical spinal nerve (C1)). [1]
A wide variety of other causes can lead to damage of the nerve. These include surgical damage, medullary stroke, multiple sclerosis, Guillain-Barre syndrome, infection, sarcoidosis, and presence of an ectatic vessel in the hypoglossal canal. [15] [16] Damage can be on one or both sides, which will affect symptoms that the damage causes. [2]