The Atlas ' chief peculiarity is that it has no body, it is ring-like, and consists of an anterior and a posterior arch and two lateral masses.

The posterior part of the arch presents above and behind a rounded edge for the attachment of the posterior atlantooccipital membrane, while immediately behind each superior articular process is a groove ( sulcus arteriae vertebralis ), sometimes converted into a foramen by a delicate bony spiculum which arches backward from the posterior end of the superior articular process.

On the under surface of the posterior arch, behind the articular facets, are two shallow grooves, the inferior vertebral notches.

A muscular slip, the axillary arch, varying from 7 to 10 cm in length, and from 5 to 15 mm in breadth, occasionally springs from the upper edge of the latissimus dorsi about the middle of the posterior fold of the axilla, and crosses the axilla in front of the axillary vessels and nerves, to join the under surface of the tendon of the pectoralis major, the coracobrachialis, or the fascia over the biceps brachii.

They form the posterior portion of the vertebral arch.

A typical vertebra consists of two essential parts: an anterior ( front ) segment, which is the vertebral body ; and a posterior part – the vertebral ( neural ) arch – which encloses the vertebral foramen.

The palatine tonsils are located inside the oropharynx between two mucosa-covered pillars on the lateral sides of the cavity, the anterior being the palatoglossal arch, and the posterior being the palatopharyngeal arch.

* Vertebral foramen, the foramen formed by the anterior segment ( the body ), and the posterior part, the vertebral arch.

After splitting from the left vagus nerve, the left recurrent laryngeal loops around the aortic arch posterior to the ligamentum arteriosum, after which it ascends to the larynx.

For the mandibular arch, this function is provided by the gingiva ( gums ) and the buccal shelf ( region extending laterally ( beside ) from the posterior ( back ) ridges ), whereas in the maxillary arch, the palate joins in to help support the denture.

As pictured, the lamina is a posterior arch of the vertebral bone lying between the spinous process, which juts out in the midline, and the more lateral pedicles and transverse processes of each vertebra.

Peripheral limb angiography in five limbs with ainhum showed that the posterior tibial artery became attenuated at the ankle, and the plantar arch and its branches were absent.

** The posterior part, the true transverse process, springs from the vertebral arch behind the foramen, and is directed forward and laterally ; it ends in a flattened vertical tubercle, the posterior tubercle.

It is attached to the molars by 2 bands and has Two or four active helix springs that widen the arch of the mouth to make room for crowded teeth, or correct a posterior cross-bite, where lower teeth are buccal ( outer ) than upper teeth.

The left laryngeal nerve, which is longer, branches from the vagus nerve to loop under the arch of the aorta, posterior to the ligamentum arteriosum before ascending.

It arises from the posterior 3rd of the lower border and from the whole of the medial surface of the zygomatic arch.

At the C1 level the vertebral arteries travel across the posterior arch of the atlas through the suboccipital triangle before entering the foramen magnum.

It is further subdvided into the vertical part V3v passing vertically upwards, crossing the C2 root and entering the foramen transversarium of C1, and the horizontal part V3h, curving medially and posteriorly behind the superior articular process of the atlas, the anterior ramus of the first cervical nerve being on its medial side ; it then lies in the groove on the upper surface of the posterior arch of the atlas, and enters the vertebral canal by passing beneath the posterior atlantoöccipital membrane.

It forms the posterior vagal trunk at the lower part of the esophagus and enters the diaphragm through the esophageal hiatus.

The posterior lobe typically forms a sheet of tissue at the base of the pituitary stalk, and in most cases sends irregular finger-like projection into the tissue of the anterior pituitary, which lies directly beneath it.

In this context the heel thus forms the posterior point of support that together with the balls of the large and little toes bear the brunt of the loads.

In the smaller forms typically all cells are involved, but larger forms have anterior vegetative and posterior reproductive cells.

Just above the tubercles, the posterior aspect of the medulla is occupied by a triangular fossa, which forms the lower part of the floor of the fourth ventricle.

The scapula forms the posterior ( back ) located part of the shoulder girdle.

The sclera forms the posterior five-sixths of the connective tissue coat of the globe.

The basisphenoid forms the posterior part of the base, while the pterygoid processes represent the pterygoid bones.

These two portions of the inferior border are separated from one another by the jugular process, the notch on the anterior surface of which forms the posterior part of the jugular foramen.

The basioccipital lies in front of the opening, the two exoccipitals lie to either side, and the larger supraoccipital lies to the posterior, and forms at least part of the rear of the cranium.

The dorids ( infraorder Anthobranchia ) have the following characteristics: the branchial plume forms a cluster on the posterior part of the body, around the anus.

Normally, in children, it forms a soft mound in the roof and posterior wall of the nasopharynx, just above and behind the uvula.

In the mammalian brain, the posterior surface of the hypothalamus forms the front wall of the third ventricle ( a cerebrospinal fluid-filled cavity ) and clusters of cells ( osmoreceptors ) on this surface, notably in the organum vasculosum of the lamina terminalis ( OVLT ) and subfornical organ ( SFO ), signal this cellular dehydration to other parts of the brain, and thirst is experienced.

Nanos protein forms a gradient at the posterior end.

These snakes retain the juvenile pattern of dark elongate dorsal blotches separated by four, or more, pale gray body scales, a light gray crown with dark striping that forms an anteriorly facing spearpoint, and a solid band which covers the eyes and extends rearward to the posterior upper labial scales.

Treatment depends on the severity of the problem, and may include changes in diet ( increase in fiber and water intake ), pelvic floor exercises such as Kegel exercises, use of stool softeners, hormone replacement therapy for post-menopausal women, insertion of a pessary into the vagina, and various forms of surgery ( usually posterior colporrhaphy-the suturing of vaginal tissue ).

The original forms are still recognizable in the posterior part, with its characteristic massive jutting apses.

If a male spreads his dorsal fins in display, in this species it forms a trapezoid, with the posterior edge being shortest.

The most dorsal group of neurons originated from rhombomere 1, and the posterior raphe — which forms from the rhombomeres — is believed to derive from the posterior rhombomeres at a slightly later stage of embryonic development.

Uveitis may be classified anatomically into anterior, intermediate, posterior and panuveitic forms, based on which part of the eye is primarily affected by the inflammation.

The root and superior crus of the antihelix form the anterior wall of the scaphoid fossa, and the helix forms the posterior wall.

Because of his larger deformed posterior, he takes jokes about the area more literally especially since they often come true soon after.

The parathyroid glands are four or more small glands, about the size of a grain of rice, located on the posterior surface ( back side ) of the thyroid gland.

It is what seems to be the posterior part of a hominid cranium, measuring about 10 to 7 cm.

This maximizes the expected posterior information about X when the prior density is p ( x ); thus, in some sense, p ( x ) is the " least informative " prior about X.

It is traditionally considered to consist of the posterior section of the superior temporal gyrus in the dominant cerebral hemisphere ( which is the left hemisphere in about 97 % of people ).

Each neuron in the nucleus has one long axon that projects to the posterior pituitary gland, where it gives rise to about 10, 000 neurosecretory nerve terminals.

The posterior canal detects rolling motion, or motion about the X axis ; the anterior canal detects pitch, or motion about the Y axis ; the horizontal canal detects yaw motion, or motion about the Z axis.

It usually occurs about three to five centimetres proximal to the radio-carpal joint with posterior and lateral displacement of the distal fragment resulting in the characteristic " dinner fork " or " bayonet " like deformity.

Correct placement of the cup directly over the flexion point, about 3 cm anterior from the occipital ( posterior ) fontanelle, is critical to the success of a VE.

Just posterior to the orbits are the supratemporal fenestrae, which are about the same size as the orbits and also roughly circular.

He nevertheless does not do so: late in 1720 he is still in Paris, for letters 134 – 137 ( 140 – 145 ), which contain the whole history of Law ’ s " System ," are in fact posterior to Roxane ’ s last missive ( dated 8 May 1720 ), which he must already have received – the usual time for delivery being about five months – when he writes the latest in date of his own ( supplementary letter 8 and letter 138 and 146 ), in October and November 1720.

There is a black mark on each side of the lower jaw, and a black stripe on the posterior side of each ear ; and along the spine, from the root of the tail to about the centre of the back is a row of dark markings, somewhat like disconnected links of a chain.

The thigh bone was robust and straight, with a prominent flange about halfway down the posterior side.

They exit the pelvic girdle posterior and inferior to the inguinal ligament about 1 / 3rd laterally from the insertion point of the inguinal ligament on the pubic tubercle at which point they are referred to as the femoral arteries ..

Far less is known about this group having SCT yet the impairments seem to indicate that the posterior attention networks may be more involved in the disorder than the prefrontal cortex region of the brain and difficulties with working memory so prominent in ADHD.

In particular, the information gain about a random variable X obtained from an observation that a random variable A takes the value A = a is the Kullback-Leibler divergence D < sub > KL </ sub >( p ( x | a ) || p ( x | I ) ) of the prior distribution p ( x | I ) for x from the posterior distribution p ( x | a ) for x given a.