| lateral rectus muscle of the head | <anatomy, muscle> Origin, transverse process of atlas; insertion, jugular process of occipital bone; action, inclines head to one side; nerve supply, ventral primary ramus of first cervical spinal nerve. Synonym: musculus rectus capitis lateralis, lateral rectus muscle of the head. (05 Mar 2000) |
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| frontal region of head | The surface region of the head corresponding to the outlines of the frontal bone. Synonym: regio frontalis capitis. (05 Mar 2000) |
| ligament of head of femur | A flattened ligament that passes from the fovea in the head of the femur to the borders of the acetabular notch (transverse acetabular ligament); developmentally, an artery passes to the head of the femur with the ligament which may or may not persist into adulthood; the ligament does not contribute to the integrity of the joint or control movements there. Synonym: ligamentum capitis femoris, ligamentum teres femoris, round ligament of femur. (05 Mar 2000) |
| little head of humerus | The small rounded eminence on the lateral half of the distal end of the humerus for articulation with the radius. Synonym: capitulum humeri, capitellum, little head of humerus. (05 Mar 2000) |
| long head | The head that has the more proximal origin. Nomina Anatomica lists long heads (caput longum...) of the following: 1) biceps brachii muscle (... Musculi bicipitis brachii ); 2) biceps femoris muscle (... Musculi bicipitis femoris ); 3) triceps brachii muscle (... Musculi tricipitis brachii ). Synonym: caput longum. (05 Mar 2000) |
| long head of triceps | <anatomy, muscle> Origin, infraglenoid tuberosity of scapula; insertion, posterior and upper olecranon and fascia of the forearm; action, extends and adducts arm. (06 Mar 2000) |
| long muscle of head | <anatomy, muscle> Origin, anterior tubercles of transverse processes of third to sixth cervical vertebrae; insertion, basilar process of occipital bone; action, twists or flexes neck anteriorly; nerve supply, cervical plexus. Synonym: musculus longus capitis, long muscle of head, musculus rectus capitis anticus major. (05 Mar 2000) |
| Aarskog-Scott syndrome | A syndrome of ocular hypertelorism, anteverted nostrils, broad upper lip, saddle-bag scrotum, and laxity of ligaments resulting in genu recurvatum, flat feet, and hyperextensible fingers; X-linked and autosomal dominant forms. Synonym: Aarskog-Scott syndrome. (05 Mar 2000) |
| Aarskog syndrome | <syndrome> Grier et al. (1983) reported father and 2 sons with typical Aarskog syndrome, including short stature, hypertelorism, and shawl scrotum. They tabulated the findings in 82 previous cases. X-linked recessive inheritance has been repeatedly suggested. The family reported by Welch (1974) had affected males in 3 consecutive generations. Thus, there is either genetic heterogeneity or this is an autosomal dominant with strong sex-influence and possibly ascertainment bias resulting from use of the shawl scrotum as a main criterion. Stretchable skin was present in the cases of Grier et al. (1983). Teebi et al. (1993) reported the case of an affected mother and 4 sons (including a pair of monozygotic twins) by 2 different husbands. They suggested that the manifestations were as severe in the mother as in the sons and that this suggested autosomal dominant inheritance. Actually, the mother seemed less severely affected, compatible with X-linked inheritance. Clinical signs: Mild to moderate short stature,normocephaly, Widow's peak hair, maxillary hypoplasia, broad nasal bridge, anteverted nostrils, long philtrum, broad upper lip, curved linear dimple below the lower lip, hypertelorism, ptosis, down-slanted palpebral fissures, ophthalmoplegia, strabismus, hyperopic astigmatism, large cornea, floppy ears, lop-ears,cleft lip/palate, shawl scrotum, saddle-bag scrotum, cryptorchidism, brachydactyly, digital contractures, clinodactyly, mild syndactyly, transverse palmar crease, lymphoedema of the feet, ligamentous laxity, osteochondritis dissecans, proximal finger joint hyperextensibility, flexed distal finger joints, genu recurvatum, flat feet, stretchable skin, cervical spine hypermobility, odontoid anomaly, macrocytic anaemia, hemochromatosis, hepatomegaly, portal cirrhosis, imperforate anus, rectoperineal fistula, interstitial pulmonary disease, sternal deformity. Inheritance: Sex-influenced autosomal dominant form, also X-linked form. (05 Aug 1998) |
| abdominal muscle deficiency syndrome | <syndrome> Congenital absence (partial or complete) of abdominal muscles, in which the outline of the intestines is visible through the protruding abdominal wall; in males, genitourinary anomalies (urinary tract dilation and cryptorchidism) are also found; genetics unclear. (05 Mar 2000) |
| abstinence syndrome | <syndrome> A constellation of physiologic changes undergone by persons or animals who have become physically dependent on a drug or chemical due to prolonged use at elevated doses, but who are abruptly deprived of that substance. The abstinence syndrome varies with the drug to which dependence has developed. Generally the effects observed are in an opposite direction from those produced by the drug; e.g., the withdrawal syndrome from central nervous system depressants such as barbiturates and benzodiazepines consists of insomnia, restlessness, tremulousness, hallucinations, and, in the extreme, tonic-clonic convulsions which may prove fatal. The onset time and severity of the abstinence syndrome depend upon how rapidly the drug disappears from the body. (05 Mar 2000) |
| Achard syndrome | <syndrome> Arachnodactyly with small receding mandible, broad skull, and joint laxity limited to the hands and feet; genetics unclear. (05 Mar 2000) |
| Achard-Thiers syndrome | <syndrome> One form of a virilizing disorder of adrenocortical origin in women, characterised by masculinization and menstrual disorders in association with manifestations of diabetes mellitus, such as glucosuria. (05 Mar 2000) |
| Achenbach syndrome | <syndrome> Haematoma of the finger pad with accompanying oedema; of unknown cause in the absence of disturbances in blood coagulation mechanisms. (05 Mar 2000) |
| achoo syndrome | <syndrome> A disorder characterised by nearly uncontrollable paroxysms of sneezing provoked in a reflex fashion by the sudden exposure of a dark-adapted subject to intensely bright light, usually sunlight. Inheritance: autosomal dominant. (05 Aug 1998) |