| whole-arm fusion | <genetics, molecular biology> A break in the shortest arms of two acrocentric chromosomes followed by the fusion of the long arms into a single chromosome. (13 Nov 1997) |
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| control arm | The group of participants in a clinical trial who receive standard treatment or a placebo, against which those receiving the experimental treatment are compared. (09 Oct 1997) |
| stabilizing circumferential clasp arm | An arm that is relatively rigid and embraces the height of contour of the tooth. (05 Mar 2000) |
| deep fascia of arm | The deep fascia of the arm; it is continuous proximally with the pectoral fascia and the fascia covering the deltoid; distally it is continuous with the antebrachial fascia. Synonym: fascia brachii, deep fascia of arm. (05 Mar 2000) |
| dynein arm | A structure extending clockwise from one tubule of each of the 9 doublet microtubules toward the adjacent doublet seen in the axoneme of cilia or flagella (including human sperm tails); congenital absence of dynein, reflected structurally by absence of dynein arm's, can account for symptoms seen in Kartagener's syndrome and in immotile cilia syndromes. (05 Mar 2000) |
| q arm | <cell biology> The long arm of a chromosome. All human chromosomes have 2 arms: the short (p) arm and the long (q) arms. (12 Dec 1998) |
| triceps muscle of arm | <anatomy, muscle> Origin, long or scapular head: lateral border of scapula below glenoid fossa, lateral head: lateral and posterior surface of humerus below greater tubercle, medial head: posterior surface of humerus below radial groove; insertion, olecranon of ulna; action, extends elbow; nerve supply, radial. Synonym: musculus triceps brachii, triceps muscle of arm. (05 Mar 2000) |
| upper lateral cutaneous nerve of arm | <anatomy, nerve> The terminal branch of the axillary nerve supplying the skin over the lower portion of the deltoid and for a distance below its insertion. Synonym: nervus cutaneus brachii lateralis superior, upper lateral cutaneous nerve of arm. (05 Mar 2000) |
| lateral surface of arm | The lateral surface of the arm. Synonym: facies lateralis brachii. (05 Mar 2000) |
| lower lateral cutaneous nerve of arm | <anatomy, nerve> A branch of the radial nerve supplying the skin of the lower lateral aspect of the arm; it frequently is a branch of the posterior antebrachial nerve. Synonym: nervus cutaneus brachii lateralis inferior, lower lateral cutaneous nerve of arm. (05 Mar 2000) |
| anal region | The posterior portion of the perineal region through which the anal canal opens; bounded by a line through both isehial tuberosities, the sacrotuberous ligaments and the coccyx. Synonym: regio analis, anal region. (05 Mar 2000) |
| ankle region | The region of the lower limb between the leg (crus) and the foot (pes). Synonym: regio talocruralis. (05 Mar 2000) |
| anterior antebrachial region | The area between the radial and ulnar borders of the forearm anteriorly. Synonym: facies antebrachialis anterior, regio antebrachialis anterior, anterior antebrachial region, anterior surface of forearm, facies anterior antebrachii. (05 Mar 2000) |
| anterior brachial region | The anterior region of the arm. (05 Mar 2000) |
| anterior carpal region | The anterior part of the wrist. Synonym: regio carpalis anterior. (05 Mar 2000) |