palmar arch

(redirected from arcus palmaris superficialis)
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pal·mar arch

(pahl'măr ahrch)

1. Deep palmar arch; the arterial arch located deep to the long flexor tendons in the hand, formed by the radial artery and the deep palmar branch of the ulnar artery.
Synonym(s): arcus palmaris profundus [TA] .

2. Superficial palmar arch; the arterial arch in the hand located superficial to the long flexor tendons, formed principally by the ulnar artery and usually completed by a communication with the superficial palmar branch of the radial artery.
Synonym(s): arcus palmaris superficialis [TA] .

arch

(arch) [L. arcus, a bow]

An anatomical structure having a curved or bowlike outline. See: arcus

abdominothoracic arch

The anterior and lateral boundary between the line dividing the thorax and the abdomen.

Synonym: costal arch

alveolar arch

The arch of the alveolar process of either jaw (maxillary and mandibular arch).

aortic arch

Any of a series of six pairs of vessels that develop in the embryo and connect the aortic sac with the dorsal aorta. During the fifth to seventh weeks of gestation, the arches undergo transformation, some persisting as functional vessels, others persisting as rudimentary structures, and some disappearing entirely.

axillary arch

An anomalous muscular slip across the axilla, between the pectoralis major and latissimus dorsi muscles.

branchial arch

Any of five pairs of arched structures that form the lateral and ventral walls of the pharynx of the embryo. The first is the mandibular arch; the second is the hyoid arch; the third, fourth, and fifth arches are transitory. They are partially separated from each other externally by the branchial clefts and internally by the pharyngeal pouches. They are important in the formation of structures of the face and neck.

Synonym: pharyngeal arch

carotid arch

The third aortic arch, which provides the common carotid artery.

costal arch

Abdominothoracic arch.

crural arch

The inguinal ligament, which extends from the anterior superior iliac spine to the pubic tubercle. Synonym: Poupart's ligament

deep crural arch

A band of fibers arching in front of the sheath of femoral vessels; the downward extension of the transversalis fascia.

deep palmar arch

An arch formed in the palm by the communicating branch of the ulnar and the radial artery.

dental arch

The arch formed by the alveolar process and teeth in each jaw (maxillary and mandibular arch). Synonym: arcus dentalis

arch of foot

Any of the four vaulted structures in the foot: the internal (medial) longitudinal, the outer (lateral) longitudinal, and two transverse.

glossopalatine arch

The anterior pillar of the fauces; one of two folds of mucous membrane extending from the soft palate to the sides of the tongue.

hemal arch

1. In lower vertebrates, extensions from the lateral areas of the caudal vertebrae that fuse to enclose the caudal artery and vein. In humans these are represented by the costal processes of the vertebrae.

2. An arch formed by the body and dorsal processes of a vertebra.

hyoid arch

The second branchial arch, which gives rise to the styloid process, the stylohyoid ligament, and the lesser cornu of the hyoid bone.

inferior tarsal arch

The arch of the median palpebral artery that supplies the lower eyelid.

longitudinal arch

The anteroposterior arch of the foot; the medial portion is formed by the calcaneus, talus, navicular, the three cuneiform bones, and the first three metatarsals; the lateral portion is formed by the calcaneus, cuboid, and the fourth and fifth metatarsals.

mandibular arch

1. The curved composite structure of natural dentition and supporting tissues of the mandible.

2. The residual bony ridge after teeth have been lost from the mandible.

maxillary arch

The curved composite structure of the natural dentition and supporting tissues of the upper jaw (maxillary and mandibular arch); the residual bony ridge after teeth have been lost from the upper jaw.

nasal arch

An arch formed by the nasal bones and by the nasal processes of the maxilla.

pharyngopalatine arch

The posterior pillar of the fauces; one of two folds of mucous membrane extending from the soft palate to the sides of the pharynx. The palatine tonsil lies in the front of the pharyngopalatine and behind the palatoglossal arch. Synonym: palatopharyngeal arch

plantar arch

The arch formed by the external plantar artery and the deep branch of the dorsalis pedis artery.

pubic arch

The arch formed by the rami of the ischia and pubic bones. It forms the anterior portion of the pelvic outlet.

pulmonary arch

The fifth aortic arch on the left side. It becomes the pulmonary artery.

superciliary arch

A curved process of the frontal bone lying just above the orbit, subjacent to the eyebrow, and directly above the supraorbital notch.

Synonym: superciliary ridge

superficial palmar arch

An arch in the palm forming the termination of the ulnar artery.

superior tarsal arch

The arch of the median palpebral artery that supplies the upper eyelid.

supraorbital arch

A bony arch formed by the upper margin of the orbit.

tarsal arch

See: inferior tarsal arch; superior tarsal arch

thyrohyoid arch

The third branchial arch, which gives rise to the greater cornu of the hyoid bone.

transverse arch

The transverse arch of the foot formed by the navicular, cuboid, cuneiform, and metatarsal bones.

vertebral arch

The arch formed by the posterior projection of a vertebra that, with the body, encloses the vertebral foramen. Synonym: neural arch

zygomatic arch

The formation, on each side of the cheeks, of the zygomatic process of each malar bone articulating with the zygomatic process of the temporal bone.

arch

a structure of bowlike or curved outline.

arch of aorta

the curving portion between the ascending and descending aorta, giving rise to the brachiocephalic trunk and, in some species, the left common carotid and the left subclavian artery.

aortic a's

paired vessels that run from the ventral to the dorsal aortae through the branchial arches of fishes and amniote embryos. In mammalian development, arches 1 and 2 disappear; 3 joins the common to become the internal carotid artery; 4 becomes the arch of the aorta and joins the aorta and subclavian artery; 5 disappears; 6 forms the pulmonary arteries and, until birth, the ductus arteriosus.

arterial arch

one or more arteries that form an anastomotic connection between two more or less parallel tributaries; found commonly around joints and other moveable parts.

arch arteriosus, arcus arteriosus

a large communicating branch between two arteries.

branchial a's

four pairs of mesenchymal and later cartilaginous columns in the pharyngeal wall which in fish develop into gills and in mammals become modified into structures of the ear and neck.

branchial arch derivatives

derivatives of the arches are first arch (mandible, ossicles), second arch (hyoid apparatus, ear ossicles), third arch (hyoid apparatus), fourth arch (laryngeal cartilages).

costal arch

the rim to the bony thorax formed by the conjoined asternal ribs and their connecting elastic tissue.

cricoid arch

the slender ventral half of the cricoid cartilage of the larynx. The most caudal of the palpable landmarks of the larynx.

dental arch

the curving structure formed by the crowns of the teeth in their normal position, or by the residual ridge after loss of the teeth.

hemal arch

the v- or y-shaped bone borne on the ventral surface of the tail vertebrae of some animals and which protects blood vessels. Called also chevron bone.

hyoid arch

the second branchial arch.

ischial arch, ischiatic arch

the caudal rim of the pelvis formed by the conjunction of the two ischiae. Called also sciatic arch.

lumbocostal arch of the diaphragm

the dorsal part of the diaphragm where it crosses the ventral surface of the psoas muscles. Here it is without any attachment and only serous membranes separate the thoracic and peritoneal cavities.

mandibular arch

the first branchial arch, being the rudiment of the maxillary and mandibular regions.

neural arch

the dorsal vertebral arch.

palatal arch

the arch formed by the roof of the mouth from the teeth on one side to those on the other.

palatoglossal arch

the thick fold of tissue passing from the soft palate to the lateral border of the tongue.

palatopharyngeal arch

a horizontal fold of pharyngeal mucosa that passes from the soft palate and joins with its opposite fold over the entrance to the esophagus.

palmar arch

a superficial and a deep vascular arch behind the carpus formed by the conjunction of several arteries of the forearm.

pulmonary a's

the most caudal of the embryonic aortic arches, which become the pulmonary arteries.

sciatic arch

ischial arch.

subcarpal arch

the deep palmar arch, especially of horses.

superficial dorsal arch

one of the arterial arches in the foot of carnivores.

supracarpal arch

the superficial palmar arch, especially of horses.

tendinous arch

a linear arched thickening of fascia that provides attachment for some muscles.

terminal arch

the union between the medial and lateral palmar digital arteries, which in horses runs through the solar canal within the distal phalanx.

vertebral arch

the dorsal bony arch of a vertebra, composed of paired laminae and pedicles.

zygomatic arch

the arch formed by the processes of the zygomatic and temporal bones that is the principal origin of the masseter muscle and is particularly broad and prominent in carnivores.