Mandibular foramen

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Bone: Mandibular foramen

Mandible. Inner surface. Side view. (Mandibular foramen visible at left.)
Latin	foramen mandibulae
Gray's	subject #44 173
Dorlands/Elsevier	f_12/12373269

The Mandibular foramen is an opening on the internal surface of the ramus (posterior and perpendicularly oriented part of the mandible) for divisions of the mandibular vessels and nerve to pass.

Contents

1 Contents
2 Structures of rim
3 Additional images
4 See also
5 External links

The mandibular nerve is one of three branches of the trigeminal nerve (CN V) and the only branch with motor innervation.

The inferior alveolar nerve and inferior alveolar artery enter the foramen traveling through the body and exit at the mental foramen on the anterior mandible at which point the nerve is known as the mental nerve.

These nerves provide sensory innervation to the lower teeth, as well as the lower lip and some skin on the lower face.

There are two distinct anatomies to its rim.

In the common form the rim is “V” shaped, with a groove separating the anterior and posterior parts.
In the horizontal-oval form there is no groove, and the rim is horizontally oriented and oval in shape, the anterior and posterior parts connected.

Articulation of the mandible. Medial aspect.

Foramen

v • d • e

Bones of head and neck: the face

maxilla: Body of maxilla - Maxillary sinus

surfaces of body Anterior (Incisive fossa, Canine fossa, Infraorbital foramen, Anterior nasal spine) - Infratemporal (Alveolar canals, Maxillary tuberosity) - Orbital (Infraorbital groove, Infraorbital canal) - Nasal (Pterygopalatine canal)
processes Zygomatic process - Frontal process (Agger nasi, Anterior lacrimal crest) - Alveolar process - Palatine process (Incisive foramen, Incisive canals, Foramina of Scarpa, Premaxilla, Anterior nasal spine)

lacrimal bone: Posterior lacrimal crest - Lacrimal groove

zygomatic bone: Orbital process, Zygomaticofacial foramen - Zygomaticotemporal foramen - Zygomaticoörbital foramina

palatine bone: Pterygopalatine fossa - Pterygoid fossa - Horizontal plate (Posterior nasal spine) - Perpendicular plate (Pterygopalatine canal, Sphenopalatine foramen, Pyramidal process)
processes (Orbital - Sphenoidal)

mandible: body (Symphysis menti, Mental protuberance, Mental foramen, Mylohyoid line) - Ramus (Mandibular foramen, Mylohyoid groove, Mandibular canal, Angle, Coronoid process, Condyloid process, Mandibular notch)

others: nasal bone - inferior nasal conchae (maxillary process) - vomer

v • d • e

Foramina of the skull (and canals and fissures)

foramina: cecum - ethmoidal (anterior, posterior) - incisive - jugular - lacerum - magnum - mandibular - mastoid - mental - optic - orbital (infraorbital, supraorbital) - ovale - palatine (greater, lesser) - parietal - rotundum - sphenopalatine - spinosum - stylomastoid - zygomaticofacial - zygomaticotemporal

canals: carotid - condylar - hypoglossal - incisive - pterygoid

fissures: orbital (inferior, superior) - petrotympanic

external acoustic meatus - internal acoustic meatus - cribriform plate

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