Hemangioma of the Flexor Digitorum Superficialis Tendon Sheath in the Hand

A case is reported where a flap cut of the radial slip of the flexor digitorum superficialis triggered on the proximal border of the A2 pulley within a healed intact tendon sheath. Shaving the flap resolved the problem. This illustrates another post-traumatic mechanical cause of triggering after partial division of flexor tendons.

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Camptodactyly Caused by Abnormal Insertion and Origin of Lumbrical Muscle

Journal of Hand Surgery (European Volume) ◽

10.1016/0266-7681(93)90048-k ◽

1993 ◽

Vol 18 (3) ◽

pp. 310-311 ◽

Cited By ~ 9

Author(s):

A. MINAMI ◽

T. SAKAI

Keyword(s):

Similar Case ◽

Tendon Sheath ◽

Flexor Digitorum Superficialis ◽

Transverse Carpal Ligament ◽

Lumbrical Muscle ◽

Operative Findings ◽

Flexor Digitorum ◽

Little Finger

A 12-year-old boy had camptodactyly of the little finger. Operative findings revealed an abnormal origin of the lumbrical muscle from the transverse carpal ligament, and abnormal insertion into the tendon sheath of the flexor digitorum superficialis tendon. No similar case has been reported in the literature.

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LOCKING FINGER DUE TO A PARTIAL LACERATION OF THE FLEXOR DIGITORUM SUPERFICIALIS TENDON: A CASE REPORT

Hand Surgery ◽

10.1142/s0218810414720320 ◽

2014 ◽

Vol 19 (03) ◽

pp. 437-439 ◽

Cited By ~ 3

Author(s):

Yasuhiro Seki ◽

Hiroshi Kuroda

Keyword(s):

Case Report ◽

Range Of Motion ◽

Tendon Sheath ◽

Limited Range ◽

Flexor Digitorum Superficialis ◽

Normal Side ◽

Limited Range Of Motion ◽

Proximal Stump ◽

Flexor Digitorum ◽

A1 Pulley

A 39-year-old woman sustained a small wound on the palm of her right hand, which quickly healed naturally; however, a month later pain and limited range of motion were noted in her right finger. Surgery revealed the radial half of the flexor digitorum superficialis (FDS) tendon was ruptured and formed a flap, which hooked at the entrance of the A1 pulley. The proximal stump was sutured to the remaining ulnar (normal) side of the FDS tendon. Locking occurs between the tendon flap and the tendon sheath; therefore, when there is no fibrous tendon sheath near the partially ruptured tendon, locking will not occur.

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Morphological features of the chiasma tendinum and its relation with surface landmarks and pulleys: a cadaveric study

Surgical and Radiologic Anatomy ◽

10.1007/s00276-021-02783-w ◽

2021 ◽

Author(s):

Uğur Dinç ◽

Ecem Şengezer ◽

Orhan Beger ◽

Merve Şehide Yılmaz ◽

Zeliha Kurtoğlu Olgunus

Keyword(s):

Risk Factors ◽

Tendon Rupture ◽

Tendon Sheath ◽

Clinical Applications ◽

Reference Points ◽

Flexor Digitorum Superficialis ◽

Finger Length ◽

And Gender ◽

Flexor Digitorum ◽

Formalin Fixed

Abstract Aim Chiasma tendinum (Camper’s chiasm) is of great importance in the delicate movements and stability of the fingers and takes place poorly in the literature. This study aims to reveal the morphometric details of the chiasma tendinum in relation with pulleys and other relevant structures. Materials and methods Palm and 2nd to 5th fingers of 10 (6 male, 4 female) formalin fixed cadavers were used bilaterally. After determining the superficial reference points on the fingers, the skin and the tendon sheath were incised, and then measurements of chiasma tendinum and related tendons were performed. The measurements were analyzed with respect to fingers, genders, and sides. Finally, the types of chiasma tendinum were identified and then grouped as symmetrical, asymmetrical, and pseudo chiasm. Results Pulley and chiasma tendinum positions were correlated with finger length (p < 0.01). Pulley lengths were significantly less in females. Asymmetrical chiasma tendinum types were found in 45% of the fingers. In most comparisons, values for fifth finger were significantly different than that of other fingers and chiasma tendinum types differed according to fingers and gender. The case of no fiber exchange was observed only in the 5th finger in 15%. Conclusion Findings related to the prediction of location of the pulleys and chiasma tendinum according to the superficial signs, awareness of cases where one of the two arms of the flexor digitorum superficialis is extremely thin and no fiber exchanges that may be risk factors for spontaneous tendon rupture may help provide more accurate approaches in relevant clinical applications.

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Operative Findings in Camptodactyly of the Little Finger

Journal of Hand Surgery (European Volume) ◽

10.1016/0266-7681(92)90196-9 ◽

1992 ◽

Vol 17 (6) ◽

pp. 661-664 ◽

Cited By ~ 20

Author(s):

T. OGINO ◽

H. KATO

Keyword(s):

Flexor Tendon ◽

Ring Finger ◽

Tendon Sheath ◽

Flexor Digitorum Superficialis ◽

Muscle Belly ◽

Normal Tendon ◽

Flexor Tendon Sheath ◽

Palmar Aponeurosis ◽

Operative Findings ◽

Flexor Digitorum

In five of six cases of camptodactyly in which an abnormality of the flexor tendon was examined at operation, the flexor digitorum superficialis tendon was hypoplastic and there was no continuity of the normal tendon between the muscle belly and bony insertion. The proximal end of the flexor digitorum superficialis tendon was attached to the palmar aponeurosis and the flexor tendon sheath of the ring finger in two patients, to the palmar aponeurosis in one, to the undersurface of the transverse carpal ligament in one and to the flexor tendon sheath of the ring finger in one. The tenodesis effect of the abnormal tendon of the flexor digitorum superficialis is considered to play an important role in the cause and rapid increase of the deformity of camptodactyly.

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Recovery and Fatigue Behavior of Forearm Muscles during a Repetitive Power Grip Gesture in Racing Motorcycle Riders

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18157926 ◽

2021 ◽

Vol 18 (15) ◽

pp. 7926

Author(s):

Michel Marina ◽

Priscila Torrado ◽

Raul Bescós

Keyword(s):

Duty Cycle ◽

Fatigue Behavior ◽

Median Frequency ◽

Flexor Digitorum Superficialis ◽

Muscle Training ◽

Maximal Voluntary Isometric Contraction ◽

Power Grip ◽

Road Racing ◽

Flexor Digitorum ◽

Forearm Muscle

Despite a reduction in the maximal voluntary isometric contraction (MVCisom) observed systematically in intermittent fatigue protocols (IFP), decrements of the median frequency, assessed by surface electromyography (sEMG), has not been consistently verified. This study aimed to determine whether recovery periods of 60 s were too long to induce a reduction in the normalized median frequency (MFEMG) of the flexor digitorum superficialis and carpi radialis muscles. Twenty-one road racing motorcycle riders performed an IFP that simulated the posture and braking gesture on a motorcycle. The MVCisom was reduced by 53% (p < 0.001). A positive and significant relationship (p < 0.005) was found between MFEMG and duration of the fatiguing task when 5 s contractions at 30% MVCisom were interspersed by 5 s recovery in both muscles. In contrast, no relationship was found (p > 0.133) when 10 s contractions at 50% MVC were interspersed by 1 min recovery. Comparative analysis of variance (ANOVA) confirmed a decrement of MFEMG in the IFP at 30% MVCisom including short recovery periods with a duty cycle of 100% (5 s/5 s = 1), whereas no differences were observed in the IFP at 50% MVCisom and longer recovery periods, with a duty cycle of 16%. These findings show that recovery periods during IFP are more relevant than the intensity of MVCisom. Thus, we recommend the use of short recovery periods between 5 and 10 s after submaximal muscle contractions for specific forearm muscle training and testing purposes in motorcycle riders.

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