first pharyngeal arch


first pharyngeal arch
the first of the pharyngeal arches in the human embryo, later differentiating into the sphenomandibular and anterior malleolar ligaments, malleus, and incus; it also gives rise to two prominences (the maxillary and mandibular prominences), from which the maxilla and mandible develop. Called also mandibular a.

Medical dictionary. 2011.

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  • First pharyngeal arch — First branchial arch Diagram showing the regions of the adult face and neck related to the fronto nasal process and the branchial arches …   Wikipedia

  • Pharyngeal arch — Infobox Embryology Name = Branchial arch Latin = GraySubject = 13 GrayPage = 65 Caption = Schematic of developing fetus with first, second and third arches labeled. Caption2 = Floor of pharynx of human embryo about twenty six days old. System =… …   Wikipedia

  • second pharyngeal arch — in the human embryo, the pharyngeal arch just caudal to the first pharyngeal arch; it later differentiates into the stapes, styloid process of temporal bone, stylohyoid ligament, lesser horn of the hyoid bone, and cranial part of the hyoid bone.… …   Medical dictionary

  • first arch cartilage — first pharyngeal arch cartilage Meckel c …   Medical dictionary

  • Pharyngeal groove — Pattern of the branchial arches. I IV branchial arches, 1 4 branchial pouches (inside) and/or pharyngeal grooves (outside) a Tuberculum laterale b Tuberculum impar c Foramen cecum d Ductus thyreoglossus e Sinus cervicalis …   Wikipedia

  • Pharyngeal pouch (embryology) — Infobox Embryology Name = PAGENAME Latin = GraySubject = 13 GrayPage = 65 Caption = Pattern of the branchial arches. I IV branchial arches, 1 4 branchial pouches (inside) and/or pharyngeal grooves (outside) a Tuberculum laterale b Tuberculum… …   Wikipedia

  • pharyngeal arches — term used to denote the branchial arches (q.v.) in human embryos. The first and second pharyngeal arches (qq.v.) contribute to the formation of the upper and lower jaws and the hyoid bone. The third pharyngeal arch develops into the greater horn… …   Medical dictionary

  • first arch syndrome — anomalies, including macrostomia, hemignathia, and deformities of the external ear, resulting from an inhibitory process occurring toward the seventh week of embryonic life and affecting the facial bones derived from the first pharyngeal… …   Medical dictionary

  • arch — Any structure resembling a bent bow or an a.; an arc. In anatomy, any vaulted or archlike structure. See arcus. SYN: arcus [TA]. [thru O. Fr. fr. L. arcus, bow] abdominothoracic a. a bell shaped line defined by the lower end of the sternum and… …   Medical dictionary

  • mandibular arch — n the first branchial arch of the vertebrate embryo from which in humans are developed the lower lip, the mandible, the masticatory muscles, and the anterior part of the tongue * * * 1. first pharyngeal a. 2. arcus dentalis mandibularis …   Medical dictionary


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