Jacobson organ


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Related to Jacobson organ: Flehmen response

vo·mer·o·na·sal or·gan

[TA]
a sense organ for pheromones in lower animals, usually regresses after the sixth month of gestation in humans; of debatable functional significance in humans when it does exist in vestigal form; located in a small canal, ending in a blind pouch, in the mucous membrane of the nasal septum, beginning just behind and above the incisive canal.

Jacobson organ

A blind tubular sac that develops in the medial wall of the nasal cavity, becoming a functional olfactory organ in lower animals, but degenerating or remaining rudimentary in humans. Synonym: vomeronasal organ

Jacobson,

Ludwig L., Danish anatomist, 1783-1843.
Jacobson anastomosis - a portion of the tympanic plexus.
Jacobson canal - a minute canal in the wedge of bone separating the jugular canal and carotid canal. Synonym(s): tympanic canaliculus
Jacobson cartilage - a narrow strip of cartilage located between the lower edge of the cartilage of the nasal septum and the vomer. Synonym(s): cartilago vomeronasalis
Jacobson nerve - Synonym(s): tympanic nerve
Jacobson organ - a fine vestigial horizontal canal ending in a blind pouch in the mucous membrane of the nasal septum. Synonym(s): vomeronasal organ
Jacobson plexus - a plexus on the promontory of the labyrinthine wall of the tympanic cavity, formed by the tympanic nerve, an anastomotic branch of the facial nerve, and sympathetic branches from the internal carotid plexus. Synonym(s): tympanic plexus
Jacobson reflex - flexion of the fingers elicited by tapping the flexor tendons over the wrist joint or the lower end of the radius.