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In humans, a single transverse palmar crease is a single crease that extends across the palm of the hand, formed by the fusion of the two palmar creases.Although it is found more frequently in persons with several abnormal medical conditions, it is not predictive of any of these conditions since it is also found in persons with no abnormal medical conditions.
A palmar crease is a type of crease on the palm. A single transverse palmar crease also called simian crease is sometimes associated with Down syndrome. [1] Other types of creases include the Sydney crease and the Suwon, or double transverse palmar crease. [2] Analysis of palmar creases is not very objective on the contrary to fingerprint ...
Minor physical anomalies (MPAs) are relatively minor (typically painless and, in themselves, harmless) congenital physical abnormalities consisting of features such as low-set ears, single transverse palmar crease, telecanthus, micrognathism, macrocephaly, hypotonia and furrowed tongue.
no crease Faint red marks Anterior transverse crease only Creases over anterior 2/3 of sole Creases over the entire sole Breast Imperceptible Barely perceptible Flat areola no bud Stippled areola 1–2 mm bud Raised areola 3–4 mm bud Full areola 5–10 mm bud Eye and Ear Lids fused Loosely: −1 Tightly: −2 Lids open pinna flat stays folded
Joints of the hand, X-ray Interphalangeal ligaments and phalanges. Right hand. Deep dissection. Posterior (dorsal) view. The PIP joint exhibits great lateral stability. Its transverse diameter is greater than its antero-posterior diameter and its thick collateral ligaments are tight in all positions during flexion, contrary to those in the metacarpophalangeal joint.
A wide variety of abnormalities of the hands and feet, including the nails and the creases of the hand, have been described and differentiated. [4] Many of these abnormalities do not have an impact on function but may be useful in diagnosing genetic syndromes; for example, the single transverse palmar crease is commonly associated with Down ...
However, mice with a single copy of the non-working TWIST gene survived. Further examination revealed that these mice had only minor skull, hand, and foot defects similar to those seen in SCS. The mouse TWIST gene is located on chromosome 12 in mice, which corresponds to the short arm of chromosome 7 in humans.
The predominant clinical symptoms of wrinkly skin syndrome are wrinkled and inelastic skin over the face, backs of hands/fingers, tops of feet, and abdomen; delayed closure of the fontanelle (baby's soft spot), and increased palmar and plantar creases in the hands and feet, respectively.