carotid sheath


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Related to carotid sheath: recurrent laryngeal nerve

sheath

 [shēth]
a tubular case or envelope.
arachnoid sheath the delicate membrane between the pial sheath and the dural sheath of the optic nerve.
carotid sheath a portion of the cervical fascia enclosing the carotid artery, internal jugular vein, vagus nerve, and sympathetic nerves supplying the head.
connective tissue sheath of Key and Retzius endoneurium.
crural sheath femoral sheath.
dural sheath the external investment of the optic nerve.
femoral sheath the fascial sheath of the femoral vessels.
Henle's sheath endoneurium.
lamellar sheath the perineurium.
medullary sheath myelin sheath.
myelin sheath (nerve sheath) the sheath surrounding the axon of myelinated nerve cells, consisting of concentric layers of myelin formed in the peripheral nervous system by the plasma membrane of Schwann cells, and in the central nervous system by the plasma membrane of oligodendrocytes. It is interrupted at intervals along the length of the axon by gaps known as nodes of Ranvier. Myelin is an electrical insulator that serves to speed the conduction of nerve impulses (see saltatory conduction).
pial sheath the innermost of the three sheaths of the optic nerve.
root sheath the epidermic layer of a hair follicle.
sheath of Schwann neurilemma.
synovial sheath synovial membrane lining the cavity of a bone through which a tendon moves.
tendon sheath a lubricated fibrous or synovial layer of tissue in which the tendon is housed and through which it moves.

ca·rot·id sheath

[TA]
the dense fibrous investment of the carotid artery, internal jugular vein, and vagus nerve on each side of the neck, deep to the sternocleidomastoid muscle; the layers of cervical fascia blend with it.
Synonym(s): vagina carotica [TA]

carotid sheath

the fibrous tissue enclosing the carotid artery, jugular vein, and vagus nerve on each side of the neck.

ca·rot·id sheath

(kă-rot'id shēth) [TA]
The dense fibrous investment of the carotid artery, internal jugular vein, and vagus nerve on each side of the neck, deep to the sternocleidomastoid muscle; the layers of cervical fascia blend with it.
Synonym(s): vagina carotica [TA] .

ca·rot·id sheath

(kă-rot'id shēth) [TA]
Dense fibrous investment of carotid artery, internal jugular vein, and vagus nerve on each side of the neck.

carotid

relating to the carotid artery, the principal artery of the neck. See Table 9.
carotid body
a small neurovascular structure lying in the bifurcation of the common carotid arteries, containing chemoreceptors that monitor oxygen content in blood and help to regulate respiration. Called also glomus caroticum.
carotid body tumors
usually unilateral nonfunctional adenoma, chemodectoma, nonchromaffin paraganglioma, or locally invasive carcinoma which may cause deviation of the trachea.
carotid canal
transmits the internal carotid artery to the cranial cavity through the pars petrosa of the temporal bone.
carotid sheath
contains the common carotid artery, internal jugular vein and vagosympathetic trunk.
carotid sinus
a dilatation of the proximal portion of the internal carotid or distal portion of the common carotid artery, containing in its wall pressoreceptors which are stimulated by changes in blood pressure.
carotid sinus reflex
slowing of the heart rate when pressure is applied over the carotid sinus.
carotid sinus syndrome
syncope sometimes associated with convulsive seizures due to overactivity of the carotid sinus reflex.

sheath

1. a tubular case or envelope.
2. vernacular for prepuce.
adrenal pericapsular sheath
contains a plexus of large nerve trunks with numerous ganglion cells.
arachnoid sheath
the delicate membrane between the pial sheath and the dural sheath of the optic nerve.
carotid sheath
a portion of the cervical fascia enclosing the carotid artery, internal jugular vein, and vagus or vagosympathetic nerve.
carpal tendon s's
sheaths to the tendons of the muscles which course over the carpus.
crural sheath
femoral sheath.
dural sheath
the external investment of the optic nerve.
femoral sheath
the fascial sheath of the femoral vessels.
Henle's sheath
the endoneurium, especially the delicate continuation around the terminal branches of nerve fibers.
lamellar sheath
the perineurium.
medullary sheath, myelin sheath
the sheath surrounding the axon of myelinated nerve cells, consisting of concentric layers of myelin formed in the peripheral nervous system by the plasma membrane of Schwann cells, and in the central nervous system by the plasma membrane of oligodendrocytes. It is interrupted at intervals along the length of the axon by gaps known as nodes of Ranvier. Myelin is an electrical insulator that serves to speed the conduction of nerve impulses.
pial sheath
the innermost of the three sheaths of the optic nerve.
root sheath
the epidermal layer of a hair follicle.
sheath of Schwann
neurilemma.
synovial sheath
a synovial membrane sleeve through which a tendon moves; found commonly where a tendon passes over a joint.
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References in periodicals archive ?
In conclusion, in our case of extranodal Rosai-Dorfman disease, which presented as an infiltrative mass of the carotid sheath, the diagnosis was particularly difficult to make because it was an unusual presentation of a rare disease.
Rosai-Dorfman disease presenting as an isolated extranodal mass of the carotid sheath: a case report
Computed tomography of the brain and neck demonstrated a large retropharyngeal abscess, an abscess in the left parapharyngeal space, and a small collection adjacent to the right carotid sheath at the level of C4; the cervical vertebrae and lungs were normal.
A second abscess was seen in the left parapharyngeal space adjacent to the parotid gland and sternocleidomastoid muscle, and another small collection was present adjacent to the right carotid sheath at the level of C4.
Atypical presentation of cutaneous tuberculosis and a retropharyngeal neck abscess
MRI demonstrated a left supraglottic mass, as well as a tumor in the left carotid sheath, which had possibly arisen from the left vagus nerve.
We explored the left carotid sheath and found no lesion.
Schwannoma of the larynx: a case report
Contrast-enhanced computed tomography (CT) of the neck demonstrated a left carotid sheath mass centered at the carotid bifurcation.
Pitfalls in imaging: differentiating intravagal and carotid body paragangliomas
The infection classically involves the mediastinum via two routes: (1) by fascial spread along the carotid sheath inferiorly into the mediastinum or (2) by spread through the retropharyngeal space, into the prevertebral space (danger space), and inferiorly into the mediastinum.
Necrotic material was discovered in bilateral parapharyngeal spaces, with necrosis of the fascia along the carotid sheath extending inferiorly into the mediastinum (figure 2).
Craniocervical necrotizing fasciitis of odontogenic origin with mediastinal extension
Although the mass was adherent to the carotid sheath, it was successfully peeled off.
Aggressive fibromatosis of the parapharyngeal space: two cases and treatment recommendations
The mass was hard in consistency and tethered to the carotid sheath with obliteration of fascial planes.
Extra-abdominal fibromatosis: A case report. (Original Article)
There might also be impingement of the plexus of the carotid sheath that produces irritation of the sympathetic nerves.
Eagle's syndrome. (Imaging Clinic)

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