zygapophysis 1826 zygomycosis

zy�ga�poph�y�sis, pl. zyg�a�poph�y�ses (zı′ga-pof′i-sis, -sez) SYN articular pro-cess. [G. zygon, yoke, � apophysis, offshoot]

zygo-, zyg- Combining forms meaning ayoke, a joining. [G. zygon, yoke, zygosis, a join-ing]

zy�go�ma (zı-go′ma) 1. SYN zygomatic bone.2. SYN zygomatic arch. [G. a bar, bolt, the osjugale, fr. zygon, yoke]

zy�go�mat�ic (zı′go-mat′ik) Relating to thezygomatic bone.

zy�go�mat�ic arch (zı ′go-mat′ik ahrch)[TA] The arch formed by the temporal processof the zygomatic bone as it joins the zygomaticprocess of the temporal bones. SYN zygoma (2).

zy�go�mat�ic bone (zı′go-mat′ik bon) [TA]A quadrilateral bone that forms the prominenceof the cheek; it articulates with the frontal, sphe-noid, temporal, and maxillary bones. SYN os zy-gomaticum [TA], jugal bone, mala (2), malarbone, zygoma (1).

zy�go�mat�ic nerve (zı′go-mat′ik nerv)[TA] A branch of the maxillary nerve in theinferior orbital fissure through which it passes;it gives rise to two sensory branches, the zygo-maticotemporal and zygomaticofacial, whichsupply the skin of the temporal and zygomaticregions, and is continued as the communicatingbranch of the lacrimal nerve with the zygomaticnerve. SYN nervus zygomaticus [TA], temporo-mandibular nerve.

zy�go�ma�ti�co�au�ri�cu�lar�is (zı′go-mat′i-ko-awr-ik′yu-lar′is) SYN auricularis ante-rior muscle.

zy�go�mat�i�co�fa�cial for�a�men (zı′go-mat′i-ko-fa′shal for-a′men) [TA] The open-ing on the lateral surface of the zygomatic bonebelow the orbital margin that transmits the zy-gomaticofacial nerve. SYN foramen zygomatico-faciale [TA].

zy�go�mat�i�co�or�bi�tal ar�te�ry (zı′go-mat′i-ko-or′bi-tal ahr′ter-e) Origin, superfi-cial temporal, sometimes middle temporal; dis-tribution, orbicularis oculi muscle and portionsof the orbit; anastomoses, lacrimal and palpe-bral branches of ophthalmic. SYN arteria zygo-maticoorbitalis [TA].

zy�go�mat�i�co�or�bi�tal fo�ra�men (zı′go-mat′i-ko-or′bi-tal for-a′men) The commonopening on the orbital surface of the zygomaticbone of the canals transmitting the zygomatico-facial and zygomaticotemporal nerves; some-times each of these canals has a separate open-ing on the orbi tal surface. S Y N foramenzygomaticoorbitale [TA].

zy�go�mat�i�co�tem�po�ral for�a�men (zı′go-mat′i-ko-tem′por-al for-a′men)[TA] The opening on the temporal surface ofthe zygomatic bone of the canal that gives pas-

sage to the zygomaticotemporal nerve. SYN fora-men zygomaticotemporale [TA].

zy�go�mat�ic pro�cess of max�il�la(zı′go-mat′ik pro′ses mak-sil′a) [TA] The roughprojection from the maxilla that articulates withthe zygomatic bone.

zy�go�mat�i�cus ma�jor mus�cle (zı′go-mat′i-kus ma′jor mus′el) Facial muscle ofanterior cheek extending to upper lip; origin,zygomatic bone anterior to temporozygomaticsuture; insertion, muscles at angle of mouth; ac-tion, draws upper lip upward and laterally; nervesupply, facial. See this page. SYN musculus zy-gomaticus major [TA], greater zygomatic mus-cle, musculus zygomaticus.

zygomaticus major muscle

thyroid cartilage

sternocleidomastoidsternal headclavicular head

frontalis (left half)

orbicularis oculi

orbicularis oris

zygomaticus major

zygomaticus minor

zy�go�mat�i�cus mi�nor mus�cle (zı′go-mat′i-kus mı′nor mus′el) Facial muscle ofanterior cheek extending to upper lip; origin,zygomatic bone posterior to zygomaticomaxil-lary suture; insertion, orbicularis oris of upperlip; action, draws upper lip upward and out-ward; nerve supply, facial. SYN caput zygomati-cum quadrati labii superioris, lesser zygomaticmuscle, musculus zygomaticus minor.

zy�go�max�il�la�re (zı′go-mak-si-lar-e) Acraniometric point located externally at the low-est extent of the zygomaticomaxillary suture.SYN zygomaxillary point.

zy�go�max�il�lar�y point (zı′go-mak′si-lar-e poynt) SYN zygomaxillare.

Zy�go�my�ce�tes (zı′go-mı-se′tez) A classof fungi characterized by sexual reproductionresulting in the formation of a zygospore, andasexual reproduction by means of nonmotilespores called sporangiospores or conidia. [zygo-� G. mykes (myket-), fungus]

zy�go�my�co�sis (zı′go-mı-ko′sis) A fungalinfection associated with genera of the classZygomycetes, e.g., Absidia, Mortierella, Mu-