| head of ulna | The small rounded distal extremity of the ulna articulating with the ulnar notch of the radius and the articular disk. Synonym: caput ulnae. (05 Mar 2000) |
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| head presentation | Presentation of any part of the foetal head, usually the upper and back part as a result of flexion such that the chin is in contact with the thorax in vertex presentation; there may be degrees of flexion so that the presenting part is the large fontanel in sincipital presentation, the brow in brow presentation, or the face in face presentation. Synonym: head presentation. (05 Mar 2000) |
| head process | The primordium for the notochord. See: notochordal process. (05 Mar 2000) |
| head protective devices | Personal devices for protection of heads from impact, penetration from falling and flying objects, and from limited electric shock and burn. (12 Dec 1998) |
| Head's areas | Area's of skin exhibiting reflex hyperesthesia and hyperalgesia due to visceral disease. (05 Mar 2000) |
| Head, Sir Henry | <person> English neurologist, 1861-1940. See: Head's areas, Head's lines, Head's zones. (05 Mar 2000) |
| Head's lines | Bands of cutaneous hyperesthesia associated with acute or chronic inflammation of the viscera. Synonym: Head's zones, tender lines, tender zones. (05 Mar 2000) |
| Head's zones | Bands of cutaneous hyperesthesia associated with acute or chronic inflammation of the viscera. Synonym: Head's zones, tender lines, tender zones. (05 Mar 2000) |
| head tetanus | A type of local tetanus that follows wounds to the face and head; after a brief incubation (1-2 days) the facial and ocular muscles become paretic yet undergo repeated tetanic spasms. The throat and tongue muscles may also be affected. Synonym: cerebral tetanus, head tetanus, hydrophobic tetanus, rose cephalic tetanus, Rose's cephalic tetanus. (05 Mar 2000) |
| head-tilt | An abnormal position of the head adopted to prevent double vision resulting from underaction of the vertical ocular muscles. (05 Mar 2000) |
| head tremors | Head movements associated with congenital nystagmus, spasmus nutans, and miner's nystagmus. Synonym: head tremors. (05 Mar 2000) |
| saddle head | Craniosynostosis in which the upper surface of the skull is concave, presenting a saddle-shaped appearance in profile. Synonym: saddle head. Origin: clino-+ G. Kephale, head (05 Mar 2000) |
| hourglass head | In congenital syphilis, a skull with depressed coronal suture. (05 Mar 2000) |
| humeral head | The name applied to the heads of forearm muscles that attach to the humerus. Nomina Anatomica lists humeral heads (caput humerale...) of the following: 1) flexor carpli ulnaris muscle (... Musculi flexoris carpi ulnaris ); 2) pronator teres muscle (... Musculi pronatoris teretis ). Synonym: caput humerale. (05 Mar 2000) |
| short head | For a muscle with two heads of origin (a "biceps" muscle), the head originating nearest the insertion. See: short head of biceps brachii muscle, short head of biceps femoris muscle. Synonym: caput breve. (05 Mar 2000) |