What is pterygomandibular space?
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What is pterygomandibular space?
The pterygomandibular space (PM) is a space largely composed of connective tissue and muscle but also contains several neurovascular structures. It is triangular in shape and is bounded by the medial surface of the mandibular ramus laterally.
What are the Masticator spaces?
The masticator space is a deep facial space that is outlined by the superficial layer of the deep cervical fascia and lies laterally and evenly in front of the prestyloid space, medial to the pharyngeal space and beneath the skull base.
What are the pharyngeal spaces?
The parapharyngeal space (or lateral pharyngeal or pharyngomaxillary space) is in the upper neck above the hyoid bone. It is an inverted cone-shaped potential space that extends from the hyoid bone to the base of the skull.
Where is the right Masticator space?
The masticator space is situated laterally to the medial pterygoid fascia and medially to the masseter muscle. It is bounded by the sphenoid bone, the posterior aspect of the mandible, and the zygomatic arch. It lies inferiorly to the temporal space and is anterolateral to the parapharyngeal space.
How do you detect pterygomandibular raphe?
It is a paired structure, with one on each side of the mouth. Superiorly, it is attached to the pterygoid hamulus of the medial pterygoid plate of the sphenoid bone. Inferiorly, it is attached to the posterior end of the mylohyoid line of the mandible. Its medial surface is covered by the mucous membrane of the mouth.
What are Pterygoids?
Pterygoid muscles. The pterygoid muscles are two of the four muscles of mastication, located in the infratemporal fossa of the skull. These muscles are: lateral pterygoid and medial pterygoid. The primary function of the pterygoid muscles is to produce movements of the mandible at the temporomandibular joint.
Why is parapharyngeal space important?
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.
Which nerve passes through parapharyngeal space?
Several cranial nerves also run though the parapharyngeal space, including the glossopharyngeal, vagus, accessory, and hypoglossal nerves. The relationship of these nerves to the other structures in the parapharyngeal space is important for avoiding injury to these structures.
What is Pterygomandibular block?
The pterygomandibular space is the area where local anesthetic solution is deposited during an inferior alveolar nerve block, a common procedure used to anesthetize the distribution of the inferior alveolar nerve.
What is pterygomandibular raphe?
Medical Definition of pterygomandibular raphe : a fibrous seam that descends from the pterygoid hamulus of the medial pterygoid plate to the mylohyoid line of the mandible and that separates and gives rise to the superior constrictor of the pharynx and the buccinator.
What is the action of the Pterygoids?
The primary function of the lateral pterygoid muscle is to pull the head of the condyle out of the mandibular fossa along the articular eminence to protrude the mandible. A concerted effort of the lateral pterygoid muscles helps in lowering the mandible and opening the jaw.
What do the lateral Pterygoids do?
Being a masticatory muscle, the lateral pterygoid aids in chewing and biting actions by controlling the movements of the mandible. The sphenoid attachment of the muscle is always fixed, meaning that the direction of pull is oriented towards it.
What is parapharyngeal space?
Listen to pronunciation. (PAYR-uh-fuh-RIN-jee-ul …) A triangular area near the pharynx (throat), between the base of the skull and the hyoid bone (the bone under the tongue).
What divides parapharyngeal space?
Divisions. The parapharyngeal space is divided into 2 parts by the fascial condensation called the aponeurosis of Zuckerkandl and Testut (stylopharyngeal fascia – see diagram), joining the styloid process to the tensor veli palatini.
