| Bell's palsy | A condition that involves the facial nerve (VII cranial nerve) and results in the paralysis of one side of the face. Bell's (facial nerve palsy) can be differentiated from a central (stroke) deficit by the inability to raise the eyebrow on the affected side. (27 Sep 1997) |
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| Bell's phenomenon | A patient with peripheral facial paralysis cannot close the eyelids of the affected side without at the same time moving the eyeball upward and outward. (05 Mar 2000) |
| Bell's respiratory nerve | <anatomy, nerve> Arises from the fifth, sixth, and seventh cervical nerves (roots of brachial plexus), descends the neck behind the brachial plexus, and is distributed to the serratus anterior muscle; it is somewhat unusual in that it courses on the superficial aspect of the muscle is supplies; its paralysis results in "winged scapula". Synonym: nervus thoracicus longus, Bell's respiratory nerve, external respiratory nerve of Bell, posterior thoracic nerve. (05 Mar 2000) |
| Bell's spasm | Involuntary twitching of the facial muscles, sometimes unilateral. Synonym: Bell's spasm, convulsive tic, facial spasm, histrionic spasm, mimic convulsion, mimic spasm, mimic tic, palmus, prosopospasm. (05 Mar 2000) |
| bell stage | Third stage of tooth development, wherein the cells form the inner enamel epithelium, the stratum intermedium, the stellate reticulum, and the outer enamel epithelium; the enamel organ assumes a bell shape. (05 Mar 2000) |
| syndrome, martin-bell | Better known as the fragile X syndrome, the most common heritable form of mental retardation. Fragile x syndrome is due to mutation (changes) at the fragile x site and so perforce is x-linked (carried on the x chromosome). Although it is usually more severe in males than females, the syndrome is due to a dynamic mutation (a trinucleotide repeat) that can change in length and hence in severity from generation to generation, from person to person, and even within a given person. The fragile x syndrome is known as the martin-bell syndrome in honor of their discovery of it in 1943. (12 Dec 1998) |
| external respiratory nerve of Bell | <anatomy, nerve> Arises from the fifth, sixth, and seventh cervical nerves (roots of brachial plexus), descends the neck behind the brachial plexus, and is distributed to the serratus anterior muscle; it is somewhat unusual in that it courses on the superficial aspect of the muscle is supplies; its paralysis results in "winged scapula". Synonym: nervus thoracicus longus, Bell's respiratory nerve, external respiratory nerve of Bell, posterior thoracic nerve. (05 Mar 2000) |
| Abernethy, John | <person> British surgeon and anatomist, 1764-1831. See: Abernethy's fascia. (05 Mar 2000) |
| Baker, john Randal | <person> English zoologist, *1900. See: Baker's pyridine extraction, Baker's acid haematein. (05 Mar 2000) |
| Baldy, John | <person> U.S. Gynecologist, 1860-1934. See: Baldy's operation. (05 Mar 2000) |
| Barlow, John | <person> 20th century South African cardiologist. See: Barlow syndrome. (05 Mar 2000) |
| Barton, John Rhea | <person> U.S. Surgeon, 1794-1871. See: Barton's bandage, Barton's forceps, Barton's fracture. (05 Mar 2000) |
| Beckwith, John Beckwith | <person> U.S. Pathologist, *1933. See: Beckwith-Wiedemann syndrome. (05 Mar 2000) |
| Bittner, John | <person> U.S. Oncologist, 1904-1961. See: Bittner agent, Bittner's milk factor. (05 Mar 2000) |
| Bowen, John | <person> U.S. Dermatologist, 1857-1941. See: Bowen's disease, Bowen's precancerous dermatosis, bowenoid papulosis, Bowenoid cells. (05 Mar 2000) |