The retropharyngeal space (between the posterior pharyngeal wall and the prevertebral layer of deep cervical fascia) contains loose connective tissue and lymph nodes that drain the nasopharynx, paranasal sinuses, middle ear, teeth, and adjacent bones.
What is the retropharyngeal space continuous with?
The retropharyngeal space It is continuous with the parapharyngeal space anteriorly and the sublingual space. The retropharyngeal space runs between the base of the skull to the level of the seconds thoracic vertebra where the fascial layers fuse.
Where does the retropharyngeal space end?
It is bounded at the top by the skull base, at the front by the alar fascia and behind by the prevertebral fascia. It comes to an end at the level of the diaphragm. The retropharyngeal space is found anterior to the danger space, between the alar fascia and buccopharyngeal fascia.
Is the retropharyngeal space the danger space?
The danger space is immediately posterior to the retropharyngeal space and immediately anterior to the prevertebral space, between the alar and prevertebral divisions of the deep layer of the deep cervical fascia. It extends from the skull base to the posterior mediastinum and diaphragm.What are the parapharyngeal and the retropharyngeal spaces?
The parapharyngeal space connects posteromedially with the retropharyngeal space and inferiorly with the submandibular space. Laterally, it connects with the masticator space. The carotid sheath courses through this space into the chest. This space provides a central connection for all other deep neck spaces.
What is prevertebral?
The prevertebral muscles are a group of deep cervical muscles inside the neck located laterally at the upper vertebral column. … Furthermore they cause a lateral flexion of the cervical column and the atlanto-occipital joint through unilateral contraction.
What is danger space in dentistry?
The danger space is a deep compartment of the head and neck located behind the true retropharyngeal space, extending from the skull base to the mediastinum.
What are the contents of carotid sheath?
- the common carotid artery.
- parts of the internal carotid artery and the external carotid artery.
- the internal jugular vein.
- the vagus nerve.
- part of the recurrent laryngeal nerve.
- the deep cervical lymph nodes.
What is a prevertebral abscess?
Prevertebral abscess is one of the uncommon deep neck space infection, occupies the prevertebral space between the vertebrae bodies and prevertebral fascia, and extends from the base of the skull to the coccyx, thus allowing organisms to spread down as far as the psoas muscle sheath [1, 2].
Why is retropharyngeal space important?The retropharyngeal space is a significant region to consider when evaluating a patient with neck pain as a multitude of pathologies can manifest and affect this area. The connection of the danger space to the mediastinum allows for the spread of infections from the oral cavity to the thoracic cavity.
Article first time published onHow does infection get into retropharyngeal space?
Retropharyngeal space infections are relatively rare since the widespread use of modern antibiotics. In children, retropharyngeal space infections usually occur following an upper respiratory tract infection, while in adults they are usually caused by trauma, foreign bodies or extension from adjacent spaces.
Where is the danger space located?
The danger space is a deep compartment of the head and neck located behind the true retropharyngeal space, extending from the skull base to the mediastinum.
What is Gillette space?
84965. Anatomical terminology. The retropharyngeal space is a potential space of the head and neck, bounded by the buccopharyngeal fascia anteriorly and the alar fascia posteriorly. It contains the retropharyngeal lymph nodes.
What is in parapharyngeal space?
The parapharyngeal space is a potential space occupied by adipose tissue, cranial nerves V, IX, XI, and XII, the deep cervical lymph nodes, and the ascending pharyngeal and maxillary arteries.
Which are components of bilateral parapharyngeal space?
- Glossopharyngeal nerve (IX)
- Vagus nerve (X) together with.
- Internal carotid artery.
- Internal jugular vein in the carotid sheath.
- Accessory nerve (XI)
- Hypoglossal (XII)
- Sympathetic trunk and superior cervical ganglion of the trunk.
- Ascending pharyngeal artery.
Where is the parapharyngeal space?
A triangular area near the pharynx (throat), between the base of the skull and the hyoid bone (the bone under the tongue).
What is the alar fascia?
The alar fascia is a layer of fascia, sometimes described as part of the prevertebral fascia, and sometimes as in front of it. Cranially, it reaches the skull, and caudally, it reaches the second thoracic vertebra. It is the posterior border of the retropharyngeal space.
What is the danger zone in endodontics?
In general, the danger zone is located 4 to 6 mm below the canal chamber orifice [10], and the minimum distal dentin thickness was located between 1 and 2 mm under the furcation. The mean thickness of dentine 2 mm below the furcation in MRs of mandibular molars ranges from 0.78 to 1.27 mm [5, 7,8,9,10,11,12,13,14].
What is the Buccopharyngeal fascia?
The buccopharyngeal fascia is the component of the middle layer of the deep cervical fascia that invests the outside of the pharyngeal constrictors and buccinator muscles.
What is a Prevertable?
Medical Definition of prevertebral : situated or occurring anterior to a vertebra or the spinal column prevertebral muscles.
What is Pretracheal space?
The pretracheal (ie, anterior visceral) space is enclosed by the visceral division of the middle layer of the deep cervical fascia and lies immediately anterior to the trachea. It extends from the thyroid cartilage to the superior mediastinum.
Why is it called longus capitis?
The longus capitis muscle and the other muscles in the prevertebral layer of the neck are wrapped in the prevertebral layer of the cervical fascia, hence the name.
What is Ludwig angina?
Ludwig’s angina is a bilateral infection of the submandibular space that consists of two compartments in the floor of the mouth, the sublingual space and the submylohyoid (also known as submaxillary) space (figure 1).
What are Prevertebral muscles?
The prevertebral muscles of the head and neck include the rectus capitis anterior, rectus capitis lateralis, longus capitis, and longus colli muscles. … [2] The principle function of the prevertebral muscles is to span the vertebrae, acting with, and antagonizing the deep muscles of the upper back.
What is epidural abscess?
An epidural abscess is an infection that forms in the space between your skull bones and your brain lining (intracranial epidural abscess). Quite often, it forms in the space between the bones of your spine and the lining membrane of your spinal cord (spinal epidural abscess).
What is found in the carotid triangle?
The carotid triangle includes the common carotid artery and its bifurcation into the external carotid artery (ECA) and internal carotid artery (ICA). It usually contains the superior thyroid, lingual, facial, occipital, and ascending pharyngeal arteries.
Is the phrenic nerve in the carotid sheath?
The duct ascends to the C7 level, where it lies laterally and dorsally to the carotid sheath. It then courses caudally and ventrally to the branches of the thyrocervical trunk and phrenic nerve, terminating at the junction of the left internal jugular and subclavian veins.
What is in the circle of Willis?
The Circle of Willis is the joining area of several arteries at the bottom (inferior) side of the brain. At the Circle of Willis, the internal carotid arteries branch into smaller arteries that supply oxygenated blood to over 80% of the cerebrum.
Why Suprasternal space is called space of Burns?
The suprasternal space, which is also known as the “Burns space,” is a narrow space between the superficial and deep layers of the investing layers of the deep cervical fascia superior to the manubrium of the sternum (13).
What causes parapharyngeal abscess?
Usually, parapharyngeal abscesses arise secondary to oropharyngeal infections that spread either by direct continuity or by lymphatic drainage: acute and chronic tonsillitis. bursting of peritonsillar abscess. dental infection usually comes from the lower last molar tooth.
Which is the most serious complication of acute retropharyngeal abscess?
Retropharyngeal abscesses are uncommon but potentially life-threatening diagnoses. They can occur at any age, although are most commonly found in children under the age of five. Without proper treatment, retropharyngeal abscesses can lead to upper airway obstruction and asphyxiation.
