stapedial

Aortic arch 2 also completely regresses except to form the stapedial arteries.

They also innervate the stapedial (stapes) muscles of the middle ear and carry taste sensations from the anterior two-thirds of the tongue.

In humans, the stapedial artery is normally present in the fetus where it connects what is to become the external and internal carotid arteries.

The inferior ramus has been lost in strepsirhines while the stem of the stapedial artery has been reduced in haplorhines.

The Annular stapedial ligament is a ring of fibrous tissue that connects the base of the stapes to the oval window of the inner ear.

In rare cases, the embryonic structure is still present after birth in which case it is referred to as a persistent stapedial artery (PSA).

After that period, the external carotid artery is generated and takes over for the stapedial artery, which subsequently involutes, leaving the stapes with a windowframe-like structure.

The first pharyngeal pouch syndrome associates middle ear anomalies to the malleus and incus structures as well as to the non-differentiation of the annular stapedial ligament.

As the stapes first develops embryologically from the 6th to 8th week of life, it surrounds the stapedial artery, which supplies the majority of the vasculature of the embryonic head.

SUNY Fredonia: "Stapedial Muscle Contraction and Distortion Product OtoAcoustic Emissions Among Musicians."

Morphologically, Hesperolemur is distinct from other notharctine taxa in having a partially fused ectotympanic anulus in the auditory bulla, no stapedial artery, and no lower molar paraconids.

In human anatomy, the stapedial branch of posterior auricular artery, or stapedial artery for short, is a small artery supplying the stapedius muscle in the inner ear.

There, he was the first to demonstrate physiologically that the innervation of the tensor tympani muscle was by the trigeminal nerve and that the innervation of the stapedial muscle was by the facial nerve.

On the obliteration of the stapedial artery this anastomosis enlarges and forms the internal maxillary artery, and the branches of the stapedial artery are now branches of this vessel.

The common stem of the infraorbital and mandibular branches passes between the two roots of the auriculotemporal nerve and becomes the middle meningeal artery; the original supraorbital branch of the stapedial is represented by the orbital twigs of the middle meningeal.

The following are possible shared derived features of Plesiadapiformes: maxillary-frontal contact in orbit, the presence of a suboptic foramen, an ossified external auditory meatus, the absence of a promontory artery, the absence of a stapedial artery, and a strong mastoid tubercle.

The first and second arches disappear early, remnant of the 1st arch forms part of the maxillary artey (branch of external carotid) but the dorsal end of the second gives origin to the stapedial artery, a vessel which atrophies in humans but persists in some mammals.