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Mandibular foramen
The mandibular foramen sits in the ramus of the mandible
Mandible viewed from the inner side of the mandible, showing the mandibular foramen at left.
Details
Part ofmandible
Systemskeletal
Identifiers
Latinforamen mandibulae
TA98A02.1.15.028
TA2865
FMA53172
Anatomical terms of bone

The mandibular foramen is an opening on the internal surface of the ramus of the mandible. It allows for divisions of the mandibular nerve and blood vessels to pass through.

Structure

The mandibular foramen is an opening on the internal surface of the ramus of the mandible.[1][2] It allows for divisions of the mandibular nerve and blood vessels to pass through.[2]

Variation

There are two distinct anatomies to its rim.

Rarely, a bifid inferior alveolar nerve may be present, in which case a second mandibular foramen, more inferiorly placed, exists and can be detected by noting a doubled mandibular canal on a radiograph.[3]

Function

The mandibular nerve is one of three branches of the trigeminal nerve, and the only one having motor innervation. One branch of it, the inferior alveolar nerve, as well as the inferior alveolar artery, enter the foramen traveling through the body in the mandibular canal 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.[1]

Clinical significance

Local anaesthetic can be injected around the mandibular foramen to anaesthetise the mandibular nerve, and thereby the mandible the lower teeth on that side, and some skin on the lower face.[1]

Other animals

The mandibular foramen can be found in other mammals, such as horses.[2]

Additional images

References

  1. ^ a b c Campoy, Luis; Read, Matt (2015). "12 - Local and Regional Anesthetic Techniques". Handbook of Veterinary Pain Management (3rd ed.). Mosby. pp. 224–265. doi:10.1016/B978-0-323-08935-7.00012-0. ISBN 9780323089357.
  2. ^ a b c Doherty, Tom; Schumacher, James (2011). "15 - Dental restraint and anesthesia". Equine Dentistry (3rd ed.). Saunders. pp. 241–244. doi:10.1016/B978-0-7020-2980-6.00015-5. ISBN 978-0-7020-2980-6.
  3. ^ Fehrenbach, Margaret; Herring, Susan (2011). Illustrated Anatomy of the Head and Neck (4th ed.). Saunders. p. 59. ISBN 9781455706303.

External links

The facial skeleton of the skull
Foramina of the skull (and canals, fissures, meatus, and hiatus)
Authority control databases
Category