Items tagged “anatomy”
348 results found
Separate left anterior descending artery and left circumflex artery origins
Published 01 Dec 2015
Thigh refers to the portion of the lower limb between the hip and knee joints. Note that in an anatomical context "leg" refers to the portion between the knee and ankle joints and not to the entire lower limb.
Leg refers to the portion of the lower limb between the knee and ankle joints. Note that this anatomical definition is different from the everyday use of the word "leg" which often refers to the entire lower limb. The upper portion of the lower limb, between hip and knee joints, is referred to a...
Pericardial sleeve recess
Published 23 Jan 2016
The ilium (plural: ilia) is one of the three bony components of the innominate bone: ilium, ischium, and pubis. These are individual bones in the immature skeleton which fuse to form one bone in adults, the principal union being in the acetabulum. The ilium is not to be confused with the ileum:...
The pubis, together with the ilium and ischium, make up the innominate bone of the pelvis. These are individual bones in the young and unite to form one bone in adults, the principal union forming the fused acetabulum. The pubis is the ventral part of the innominate bone and forms a median cart...
Abductor pollicis brevis muscle
The abductor pollicis brevis muscle is a thin subcutaneous muscle located laterally in the thenar eminence of the hand, and is one of the intrinsic muscles of the hand. Summary origin: mainly from the flexor retinaculum few fibers originate from the tubercles of scaphoid and trapezium and ten...
Opponens pollicis muscle
The opponens pollicis muscle is one of the muscles of the thenar eminence, deep to abductor pollicis brevis, and is one of the intrinsic muscles of the hand. The three muscles that constitute the thenar eminence muscle group are abductor pollicis brevis, flexor pollicis brevis and opponens polli...
Normal foot MRI
Diagnosis not applicable
Published 11 Mar 2016
Typical thoracic vertebrae
Given the twelve thoracic vertebrae are largely similar, most are considered typical thoracic vertebrae with the exceptions T1 and T9 to T12. For a basic anatomic description of the structure of typical vertebrae, see vertebrae. Terminology In medical English, some doctors and texts refer to t...
T1 is an atypical thoracic vertebra. In contrast to typical thoracic vertebrae, it contains a complete facet for the 1st rib and a demifacet for the 2nd rib. It contains lips on the upper surface of the body. T1 also has a spinous process more horizontal than other thoracic vertebrae.
T11 is an atypical thoracic vertebra. In contrast to typical thoracic vertebrae, it contains a single costal facet that articulates with the atypical eleventh rib. There are no facets on the transverse processes.
T12 is an atypical thoracic vertebra. In contrast to typical thoracic vertebrae, it contains a single costal facet with no facets on transverse processes.
Atypical thoracic vertebrae
T1 and T9 - T12 are considered atypical thoracic vertebrae. T1 bears some resemblance to low cervical vertebrae T9 has no inferior demifacet T10 often, but not always, shares features with T11 and T12. For a basic anatomic description of the structure a generic vertebra, see vertebrae.
The thoracic spine (often shortened to T-spine) forms the middle part of the vertebral column. It extends from below C7 of the cervical spine to above L1 of the lumbar spine. There are 12 thoracic vertebra, termed T1-T12. The thoracic spine is unique due to its articulation with ribs via costal...
Atypical lumbar vertebrae
Of the five lumbar vertebrae, L5 is considered atypical due to its shape. The remaining lumbar vertebrae are largely typical. For a basic anatomic description of the structure a generic vertebra, see vertebrae.
Atypical cervical vertebrae
Of the cervical vertebrae, the atlas (C1), axis (C2) and vertebra prominens (C7) are considered atypical cervical vertebrae. The atlas (C1) lacks a body or spinous process. It has anterior and posterior arches with lateral masses. Its superior articular surfaces articulate with the occiput at t...
Wrist anatomy - extrinsic ligaments
Diagnosis not applicable
Published 26 Mar 2016
Tensor tympani muscle
The tensor tympani muscle is a short muscle in the middle ear that arises from the superior surface of the cartilaginous part of the Eustachian tube, the greater wing of the sphenoid, and the petrous part of the temporal bone. It passes into the protympanum of the tympanic cavity, covered by the...
Typical ribs are those numbered 2 to 10 with ribs 1, 11 and 12 considered atypical. Some authors however include ribs 2 and 10 also atypical. Gross anatomy A typical rib is long and flat. They contain a: head neck tubercle shaft angle Ribs have a rounded, smooth superior border. The infe...