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opponens

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op·po·nens

(ŏ-pō'nens),
A name given to several muscles of the fingers or toes, by the action of which these digits are opposed to the others. The opponens muscles of the hands act at the carpometacarpal joints, cupping the palm; this enables flexion at the metacarpophalangeal joints to oppose the thumb to the small finger or vice versa. Although comparable muscles in the foot are also called opponens, no true opposition occurs in the foot.
[L. op-pono (obp-), pres. p. -ens, to place against, oppose]
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References in periodicals archive
Forrest found that the opponens pollicis had double motor innervation in 20% of his cases, while Sala found it in one third of his cases.
Anastomosis Between the Deep Branch of Ulnar Nerve and a Branch of the Median Nerve (Cannieu-Riche Anastomosis) and Thenar Muscles Innervation. Anatomical Study and Clinical Implications/Anastomosis entre el Ramo Profundo del Nervio Ulnar y un Ramo del Nervio Mediano (Anastomosis de Cannieu-Riche) e Inervacion de la Eminencia Tenar. Estudio Anatomico e Implicaciones Clinicas
The hook serves as a site of attachment of several structures including the flexor digiti minimi, opponens digiti minimi, pisiohamate ligaments, and distal portion of the transverse carpal ligament.
Hook of the hamate fracture
Further, noxious heat applied to the lateral edge of the hand reduced the MEPs of FDI and opponens pollicis muscles [29].
Differential Corticomotor Excitability Responses to Hypertonic Saline-Induced Muscle Pain in Forearm and Hand Muscles
(13,14) Apart from this branch, the bulk of the ulnar nerve passes through the ulnar canal (Guyon's canal) at the wrist and divides into a superficial branch which provides motor innervation to the palmaris brevis and skin sensation to the palmar surface of D5 and medial half of D4.1314 The deep motor branch of the ulnar nerve then innervates the hypothenar muscles (abductor digiti minimi, flexor digiti minimi, and opponens digiti minimi), lumbricale muscles to D4 and D5, and the ulnar intrinsics including the dorsal and palmar interassei and adductor pollicis.
GEHS Neurophysiological Classification System for Patients with Neuropathy of the Ulnar Nerve at the Elbow
The long opponens thumb spica splint is commonly used; it immobilizes the wrist and CMC, while leaving the thumb interphalangeal joint free.
Hand and arm pain: a pictorial guide to injections: this article, with illustrative figures, will help you get to the cause of your patient's pain and guide your administration of corticosteroid injections
The opponens claim that these kinds of scientific facts are not true.
Fossil fuels: is the empire striking back?
The following muscles and functions were tested when possible, and an average integer was reported per patient for hand and/or foot function: hand grip, opponens pollicis (opposes thumb), abductor pollicis brevis (abducts the thumb), adductor pollicis (adducts the thumb), opponens digiti minimi (opposes the little finger), abductor digiti minimi (abducts the little finger), third palmar interossei (adducts the little finger), foot dorsiflexion and plantar flexion.
Nerve decompression for leprous neuropathy: a prospective study from Ecuador
Type Group Name Intrinsic Thenar Abductor pollicis brevis (APB) hand muscles Flexor pollicis brevis (FPB) muscles Opponens pollicis (OP) -- Adductor pollicis (AP) Hypothenar Abductor digiti minimi (ADM) muscles Flexor digiti minimi (FDM) Opponens digiti minimi (ODM) Dorsal interossei (DI) Interosseous Volar interossei (VI) muscles Lumbricals (LM) Extrinsic Flexors Flexor digitorum profundus (FDP) hand Flexor digitorum superficialis (FDS) muscles Flexor pollicis longus (FPL) Extensors Extensor digitorum communis (EDC) Extensor digiti minimi proprius (EDMP) Extensor indicis proprius (EIP) Extensor pollicis brevis (EPB) Extensor pollicis longus (EPL) Abductors Abductor pollicis longus (APL) TABLE 2: The best network with lowest errors, RMSEs, and the correlation coefficients.
An Evaluation of Hand-Force Prediction Using Artificial Neural-Network Regression Models of Surface EMG Signals for Handwear Devices
Power of dorsal and palmar interosseous, flexor digiti minimi, opponens digiti minimi were reduced.
Hirayama disease
(4) The opponens pollicis is deeper and more radial and inserts along the radial aspect of the thumb metacarpal and functions more to flex the first metacarpal, aiding the APB in opposition.
Pediatric thumb flexion deformities
Sol el hipotenar abduktor digiti minimi, opponens digiti minimi kaslarinin kuvveti 3/5, sol el tenar abduktor pollicis brevis, opponens pollicis, fleksor pollicis brevis, adduktor pollicis kaslari ve sol el palmar interosseoz, lumbrikal kaslarin kuvvetleri 3/5, sol on kol fleksor pollicis longus, fleksor digitorum superfisiyalis ve profundus, abduktor pollicis longus, ekstensor indicis, ekstansor pollicis brevis ve longus, ekstansor karpi ulnaris ve radialis kaslarinin kuvvetleri 3/5 olarak degerlendirildi.
Hirayama disease/Hirayama Hastaligi
At further stages of the condition, in situations when the nerve experiences severe compression, in thenar region pain and power and skill loss arise in hands and tenar region (in abductor pollisis brevis and opponens brevis muscles innervated by motor branch of median nerve) atrophy is seen.
Carpal Tunnel Syndrome
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