Compression of the Distal Ulnar Nerve with Clawing of the Index Finger

HAND ◽  
1982 ◽  
Vol os-14 (1) ◽  
pp. 38-40 ◽  
Author(s):  
N. P. Packer ◽  
G. R. Fisk
Keyword(s):  
Ulnar Nerve ◽  
Distal Part ◽  
Similar Case ◽  
Index Finger ◽  
Motor Branch

A compression lesion of the distal part of the terminal motor branch of the ulnar nerve is presented. One similar case has been previously described (McDowell, 1977) but some unusual features are recorded here. The reported clinical varieties of lesions of the ulnar nerve in the hand are listed (Table 1).

Index finger position and force of the human first dorsal interosseus and its ulnar nerve antagonist

1994 ◽  
Vol 77 (2) ◽  
pp. 987-997 ◽  
Author(s):  
I. Zijdewind ◽  
D. Kernell
Keyword(s):  
Ulnar Nerve ◽  
Index Finger ◽  
Maximum Voluntary Contraction ◽  
Normal Subjects ◽  
Voluntary Contraction ◽  
Abduction Angle ◽  
Hand Position ◽  
First Dorsal Interosseus ◽  
Length Analysis ◽  
Neutral Angle

In normal subjects, maximum voluntary contraction (MVC) and electrical ulnar nerve stimulation (UNS; 30-Hz bursts of 0.33 s) were systematically compared with regard to the forces generated in different directions (abduction/adduction and flexion) and at different degrees of index finger abduction. With a “resting” hand position in which there was no index finger abduction, UNS produced about one-half of the abduction force elicited by an MVC (mean ratio 51%). Qualitatively, such a discrepancy would be expected, because UNS activates two index finger muscles with opposing actions in the abduction/adduction plane of torques: the first dorsal interosseus (FDI) and the first palmar interosseus (FPI). The abduction forces produced by MVC and UNS were very sensitive to index finger abduction angle: at a maximum degree of abduction, the UNS-generated force even reversed its direction of action to adduction (with FPI dominating) and the abduction MVC declined to 37% of that in the resting hand position. Inasmuch as these declines in MVC- and UNS-generated abduction force could not be explained by a change in moment arm, the main alternative seemed to be abduction-associated alterations in FDI fiber length (analysis by previously published biomechanical data). The FDI and FPI were further compared by application of a UNS-generated fatigue test (5-min burst stimulation), with the index finger kept at a "neutral" angle, i.e., the abduction angle at which, in the unfatigued state, the forces of the FDI and FPI were in balance (zero net UNS-generated abduction/adduction force).(ABSTRACT TRUNCATED AT 250 WORDS)

Restoration of ulnar nerve motor function by pronator quadratus motor branch: an anatomical study

2016 ◽  
Vol 158 (4) ◽  
pp. 755-759 ◽  
Author(s):  
Jing Rui ◽  
Yingjie Zhou ◽  
Le Wang ◽  
Jifeng Li ◽  
Yudong Gu ◽  
...  
Keyword(s):  
Ulnar Nerve ◽  
Motor Function ◽  
Anatomical Study ◽  
Pronator Quadratus ◽  
Motor Branch

Interfascicular Anatomy of the Motor Branch of the Ulnar Nerve: A Cadaveric Study

2021 ◽  
Author(s):  
Spencer B. Chambers ◽  
Kitty Yuechuan Wu ◽  
Corey Smith ◽  
Robert Potra ◽  
Louis M. Ferreira ◽  
...  
Keyword(s):  
Ulnar Nerve ◽  
Cadaveric Study ◽  
Motor Branch

A Surgical Approach to the Motor Branch of the Ulnar Nerve

1989 ◽  
Vol 84 (3) ◽  
pp. 526-528 ◽  
Author(s):  
Ronald N. Ollstein ◽  
Howard W. Siegel ◽  
Jerome E. Decker
Keyword(s):  
Ulnar Nerve ◽  
Surgical Approach ◽  
Motor Branch

Anterior interosseous nerve compression after supracondylar fracture of the humerus: a metaanalysis

1999 ◽  
Vol 90 (6) ◽  
pp. 1053-1056 ◽  
Author(s):  
Alexander Joist ◽  
Uwe Joosten ◽  
Dirk Wetterkamp ◽  
Michael Neuber ◽  
Axel Probst ◽  
...  
Keyword(s):  
Index Finger ◽  
Interphalangeal Joint ◽  
Nerve Compression ◽  
Flexor Digitorum Profundus ◽  
Pronator Quadratus ◽  
Motor Branch ◽  
Content Type ◽  
Anterior Interosseous Nerve ◽  
Anterior Interosseous Nerve Syndrome ◽  
Fine Print

Object. The authors conducted a metaanalysis of reports of anterior interosseous nerve syndrome, a rare nerve compression neuropathy that affects only the motor branch of the median nerve. This syndrome is characterized by paralysis of the flexor pollicis longus, the flexor digitorum profundus to the index finger, and the pronator quadratus, with weakness on flexion of the interphalangeal joint of the thumb and the distal interphalangeal joint of the index finger without sensory loss.Methods. The authors reviewed reports of 34 cases of anterior interosseous nerve syndrome combined with supracondylar fractures of the humerus in children. They have added a new case identified in a 7-year-old boy in whom a diagnosis was made from the clinical findings and whose treatment and outcome are analyzed. The ages of patients reported in the literature ranged from 4 to 10 years. Ten patients (29%) were treated with closed reduction and application of a cast, whereas 25 patients (71%) were treated with open reduction and fixation of the fracture.Conclusions. All patients regained full flexion and strength after 4 to 17 weeks. The fractures that were surgically treated showed no entrapment of the anterior interosseous nerve.

A Biomechanical Study of the Ulnar Nerve at the Elbow

1995 ◽  
Vol 20 (5) ◽  
pp. 623-627 ◽  
Author(s):  
F. A. SCHUIND ◽  
D. GOLDSCHMIDT ◽  
C. BASTIN ◽  
F. BURNY
Keyword(s):  
Ulnar Nerve ◽  
Distal Part ◽  
Relative Elongation ◽  
Elbow Flexion ◽  
Proximal Part ◽  
Biomechanical Study ◽  
Cubital Tunnel ◽  
Elbow Extension ◽  
Full Flexion ◽  
Significant Change

The relative elongation with elbow flexion of the ulnar nerve, proximal and distal to the cubital tunnel, and of the cubital tunnel retinaculum, was measured in cadaver specimens by stereophotogrammetry. The proximal part of the ulnar nerve elongated significantly with full elbow flexion. No significant change of length was measured in the distal part of the nerve. The length of the cubital tunnel retinaculum increased by an average of 45% from full elbow extension to full flexion.

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