Absence of Flexor Digitorum Superficialis Tendon in the Little Finger                     is not Associated with Decreased Grip Strength

We examined the little finger in 402 normal subjects for the presence or absence of the flexor digitorum superficialis. All subjects also had their grip strength measured. No statistically significant difference was seen in the grip strength measurements between subjects who had a flexor digitorum superficialis tendon to the little finger and those who did not. This study demonstrates that absence of the flexor digitorum superficialis to the little finger is not associated with decreased grip strength. The implications of this in terms of repair of the flexor digitorum superficialis of the little finger are considered.

Download Full-text

Influence of the flexor digitorum superficialis tendon transfer on grip strength

Journal of Hand Surgery (European Volume) ◽

10.1177/17531934211061220 ◽

2021 ◽

pp. 175319342110612

Author(s):

Angelina Garkisch ◽

Stefanie Schmitt ◽

Nicole Kim ◽

Dagmar-C. Fischer ◽

Karl-Josef Prommersberger ◽

...

Keyword(s):

Grip Strength ◽

Tendon Transfer ◽

Ring Finger ◽

Flexor Digitorum Superficialis ◽

Force Transmission ◽

Finger Forces ◽

Middle Ring ◽

Flexor Digitorum

The flexor digitorum superficialis tendon of the ring finger can be transferred to the thumb flexor. We followed ten patients after such a transfer for 5–128 months and measured grip strength and force transmission of the fingers and individual phalanges while the patients gripped 10-cm or 20-cm diameter cylinders. The grip strength of the middle, ring and little fingers was reduced when gripping the 10-cm cylinder, with a significantly larger decrease in the ring finger. With the 20-cm cylinder, grip forces of all fingers were almost identical, with slightly lower force of the ring finger and slightly higher forces in the index and small fingers. We conclude that after transfer of flexor digitorum superficialis tendon from a ring finger, grip strength of the ring finger is reduced. Finger forces are more hampered while gripping objects with smaller circumferences than large ones.

Download Full-text

Sliding Position of the Flexor Tendons Relative to the Hook of Hamate in CT Scans

The Journal of Hand Surgery (Asian-Pacific Volume) ◽

10.1142/s2424835519500139 ◽

2019 ◽

Vol 24 (01) ◽

pp. 72-75

Author(s):

Kenji Goto ◽

Kiyohito Naito ◽

Yoichi Sugiyama ◽

Nana Nagura ◽

Ayaka Kaneko ◽

...

Keyword(s):

Flexor Tendon ◽

Tendon Injury ◽

Ct Scans ◽

Flexor Digitorum Profundus ◽

Flexor Digitorum Superficialis ◽

Ulnar Side ◽

Flexor Tendon Injury ◽

Hook Of Hamate ◽

Flexor Digitorum ◽

Little Finger

Background: The aim of this study was to assess the height of nonunion formation injuring the ulnar-side finger flexor tendon, the positional relationship between the hook of the hamate and little finger flexor tendon was evaluated on CT scans. Methods: The subjects were 20 healthy patients (40 hands) (14 males and 6 females, mean age: 28 years old). Their hands were imaged in extension and flexion of the fingers on CT. The position of the little finger flexor tendon was determined regarding the height of the hook of the hamate as 100%. Results: The heights of the flexor digitorum profundus tendons were 46 ± 6% in extension and 44 ± 9% in flexion, and those of the flexor digitorum superficialis tendons were 87 ± 8% in extension and 91 ± 9% in flexion. Conclusions: Our study suggested that 40% of the base of the hook of the hamate does not contact with the flexor tendon, suggesting that flexor tendon injury is unlikely to occur in that region.

Download Full-text

Comparison of Muscle Activity during Use of Computer Pointing Devices in Cad Operators

Proceedings of the Human Factors and Ergonomics Society Annual Meeting ◽

10.1177/154193120004403723 ◽

2000 ◽

Vol 44 (37) ◽

pp. 633-636 ◽

Cited By ~ 1

Author(s):

Pat Tittiranonda ◽

Bernard Martin ◽

Stephen Burastero

Keyword(s):

Muscle Activity ◽

Index Finger ◽

Neck Muscles ◽

Electromyographic Activity ◽

Flexor Digitorum Superficialis ◽

Upper Trapezius ◽

Extensor Indicis Proprius ◽

Significant Difference ◽

Experimental Mouse ◽

Flexor Digitorum

This study examined the use of four different computer pointing devices on surface electromyographic activity of the index finger, forearm and shoulder/neck muscles among CAD operators in the workplace. Subjects were randomly assigned to use their own mouse, a trackball, a joystick mouse or an experimental mouse. Results showed that there was a statistically significant difference in muscle load for the upper trapezius, extensor indicis proprius, and extensor carpi ulnaris across pointing devices for CAD operations. The flexor digitorum superficialis muscle load remained relatively constant when all pointing devices were compared.

Download Full-text

Strength and Functional Recovery Following Repair of Flexor Digitorum Superficialis in Zone 2

Journal of Hand Surgery (European Volume) ◽

10.1016/0266-7681(93)90188-l ◽

1993 ◽

Vol 18 (1) ◽

pp. 22-25 ◽

Cited By ~ 18

Author(s):

H. J. BOULAS ◽

J. W. STRICKLAND

Keyword(s):

Grip Strength ◽

Functional Recovery ◽

Suture Material ◽

Flexor Digitorum Superficialis ◽

Mattress Suture ◽

Active Motion ◽

Fresh Frozen ◽

Flexor Digitorum

A two-pronged study was designed to evaluate the strength in vitro and functional recovery in vivo of FDS repairs in zone 2. In part I, horizontal mattress or Tajima grasping repairs were performed on fresh-frozen cadaveric digits, using 3/0 or 4/0 braided nylon suture material. The Tajima repair was significantly stronger than the mattress suture, using either 3/0 ( P = 0.0001) or 4/0 ( P = 0.0027) suture material. The 3/0 Tajima repair appeared strong enough to permit gentle early active motion. Furthermore, the clinical portion of the study (part II) demonstrated restoration of FDS function following repair in relatively isolated injuries in 13 out of 15 digits (86.7%), with PIP flexion averaging 80° and grip strength 89% of that in the uninjured hand.

Download Full-text

Simultaneous Traumatic Avulsion of Flexor Digitorum Superficialis and Flexor Digitorum Profundus Tendons in Left Little Finger

Global Journal of Medical and Clinical Case Reports ◽

10.17352/2455-5282.000037 ◽

2017 ◽

pp. 018-019

Author(s):

Maklad Mohamed

Keyword(s):

Flexor Digitorum Profundus ◽

Flexor Digitorum Superficialis ◽

Flexor Digitorum ◽

Little Finger

Download Full-text

Absent palmaris longus with hypoplastic flexor digitorum superficialis of the little finger: A rare case report

Indian Journal of Case Reports ◽

10.32677/ijcr.2021.v07.i06.014 ◽

2021 ◽

Vol 7 (6) ◽

pp. 263-265

Author(s):

Sheerin Shah ◽

Renu Verma ◽

Karanjit Singh ◽

Rajinder Kumar Mittal ◽

Ramneesh Garg

Keyword(s):

Case Report ◽

Rare Case ◽

Flexor Digitorum Superficialis ◽

Palmaris Longus ◽

Rare Case Report ◽

Flexor Digitorum ◽

Little Finger

Download Full-text

Unusual Closed Traumatic Avulsion of Both Flexor Tendons in Zones 1 and 3 of the Little Finger

Case Reports in Orthopedics ◽

10.1155/2016/6837298 ◽

2016 ◽

Vol 2016 ◽

pp. 1-4

Author(s):

Marie-Aimée Päivi Soro ◽

Thierry Christen ◽

Sébastien Durand

Keyword(s):

Rare Condition ◽

Flexor Digitorum Profundus ◽

Flexor Digitorum Superficialis ◽

Review Of The Literature ◽

Flexor Tendons ◽

Flexor Digitorum ◽

Tendon Avulsion ◽

Little Finger

Closed tendon avulsion of both flexor tendons in the same finger is an extremely rare condition. We encountered the case of a patient who presented a rupture of the flexor digitorum profundus in zone 1 and flexor digitorum superficialis in zone 3 in the little finger. This occurrence has not been reported previously. We hereby present our case, make a review of the literature of avulsion of both flexor tendons of the same finger, and propose a treatment according to the site of the ruptures.

Download Full-text

Effect of a Flexor Digitorum Superficialis Hemitenodesis on Reducing Volar Plate Strains for Swan Neck Deformities

Hand ◽

10.1177/15589447211040877 ◽

2021 ◽

pp. 155894472110408

Author(s):

Mohammad M. Haddara ◽

Assaf Kadar ◽

Louis M. Ferreira ◽

Nina Suh

Keyword(s):

Repeated Measures ◽

Statistical Significance ◽

Volar Plate ◽

Flexor Digitorum Profundus ◽

Flexor Digitorum Superficialis ◽

Common Procedure ◽

Motion Simulator ◽

Significant Difference ◽

Intact Condition ◽

Flexor Digitorum

Background Flexor digitorum superficialis (FDS) hemitenodesis is a common procedure to treat swan neck deformity (SND). We hypothesize that this surgical technique is a biomechanically effective way to reduce strain in the volar plate at the proximal interphalangeal joint (PIPJ). Methods Fifteen digits from 5 cadaveric specimens were tested using a novel in vitro active finger motion simulator under 4 finger conditions: intact, SND, FDS hemitenodesis, and FDS hemitenodesis with distal interphalangeal (DIP) joint fusion. Tensile loads in FDS and flexor digitorum profundus (FDP) and joint ranges of motion were measured by electromagnetic tracking. In addition, strain gauges were inserted under the volar plate to measure strain during PIPJ hyperextension. Results were analyzed using 1-way repeated-measures analysis of variance tests. Results The SND condition increased volar plate strain by 176% ± 25% ( P < .001) compared with the intact condition. The FDS hemitenodesis repair relieved more than 50% of the SND strain, restoring it to within no statistical difference from intact. The DIP fusion further reduced strain with no further statistical significance. At full flexion, FDS and FDP tendon loads diverged as a function of the test condition ( P < .001). With the FDS hemitenodesis, the FDP load increased by 2.1 ± 1.5 N from the SND condition ( P < .001), whereas the FDS load decreased by 1.3 ± 1.3 N ( P = .012). Conclusion The FDS hemitenodesis repair restored strains to within 3.0 milli-strain of the intact condition with no significant difference. Application of DIP fusion did not further protect the PIPJ from increased hyperextension and further exacerbated the imbalance of flexor tendon loads.

Download Full-text