Evolutionary adaptations in the flexor digitorum profundus muscle in Tamandua mexicana (Xenarthra, Myrmecophagidae)

2020 ◽  
Author(s):  
Juan Fernando Vélez‐García ◽  
Aura Cristina Arbeláez‐Quiñones ◽  
Karoll Dayanna Montealegre‐Hurtado
Keyword(s):  
Flexor Digitorum Profundus ◽  
Flexor Digitorum ◽  
Flexor Digitorum Profundus Muscle ◽  
Tamandua Mexicana

Anatomic variation of the innervation of the flexor digitorum profundus muscle and its clinical implications

2009 ◽  
Vol 39 (4) ◽  
pp. 498-502 ◽  
Author(s):  
Chang-Seok Oh ◽  
Hyung-Sun Won ◽  
Kyu-Seok Lee ◽  
In-Hyuk Chung ◽  
Seung Min Kim
Keyword(s):  
Anatomic Variation ◽  
Flexor Digitorum Profundus ◽  
Clinical Implications ◽  
Flexor Digitorum ◽  
Flexor Digitorum Profundus Muscle

Congenital Shortening of the Flexor Digitorum Profundus Muscle

2007 ◽  
Vol 32 (2) ◽  
pp. 168-171 ◽  
Author(s):  
Takehiko Takagi ◽  
Shinichiro Takayama ◽  
Hiroyasu Ikegami ◽  
Toshiyasu Nakamura
Keyword(s):  
Flexor Digitorum Profundus ◽  
Flexor Digitorum ◽  
Flexor Digitorum Profundus Muscle

Electromyographs of the flexor digitorum profundus muscle are useful for the diagnosis of inclusion body myositis

2012 ◽  
Vol 46 (2) ◽  
pp. 181-186 ◽  
Author(s):  
Keiichi Hokkoku ◽  
Masahiro Sonoo ◽  
Mana Higashihara ◽  
Erik Stålberg ◽  
Teruo Shimizu
Keyword(s):  
Inclusion Body ◽  
Inclusion Body Myositis ◽  
Flexor Digitorum Profundus ◽  
Flexor Digitorum ◽  
Flexor Digitorum Profundus Muscle

Short-Term Synchronization Between Motor Units in Different Functional Subdivisions of the Human Flexor Digitorum Profundus Muscle

2004 ◽  
Vol 92 (2) ◽  
pp. 734-742 ◽  
Author(s):  
Karen T. Reilly ◽  
Michael A. Nordstrom ◽  
Marc H. Schieber
Keyword(s):  
Motor Units ◽  
Flexor Digitorum Profundus ◽  
Short Term ◽  
Common Input ◽  
Limited Ability ◽  
Motoneuron Pool ◽  
Flexor Digitorum ◽  
Human Nervous System ◽  
Central Factors ◽  
Flexor Digitorum Profundus Muscle

The ability to independently move the digits is limited by peripheral as well as central factors. A central limitation to independent finger movements might arise from the inability of the human nervous system to activate motor units (MUs) that exert force on one finger without also activating MUs that exert force on adjacent fingers. Short-term synchronization between MU pairs is thought to be the result of the two motoneurons receiving common input from last-order neuronal projections. The human flexor digitorum profundus (FDP) muscle contains four subdivisions, one for each of the fingers. We hypothesized that the distribution of MU synchrony within and between subdivisions of FDP might parallel the ability to selectively activate different functional subdivisions within FDP, and the ability to flex one digit independently of another. We found that the degree of MU synchrony indeed was not uniform among the different functional subdivisions of FDP; MUs acting on ulnar digits (d5, d4) were more synchronized than MUs acting on radial digits (d2, d3). Furthermore, synchrony was observed between MU pairs where each unit acted on a different digit and was highest when both units of a pair acted on the least-independent digits (d4, d5). This indicates that the CNS does not exert completely independent control over the different functional subdivisions of FDP. The strength of synchrony appears related to the inability to produce completely independent forces or movements with the digits. These observations reflect widespread divergence of last-order inputs within the FDP motoneuron pool, and we suggest that the organization of the CNS drive to this muscle contributes to the limited ability of humans to flex one digit in isolation from other digits.

Variations in Innervation of the Flexor Digitorum Profundus Muscle

1999 ◽  
Vol 24 (4) ◽  
pp. 700-703 ◽  
Author(s):  
Niloy Bhadra ◽  
Michael W. Keith ◽  
P. Hunter Peckham
Keyword(s):  
Flexor Digitorum Profundus ◽  
Flexor Digitorum ◽  
Flexor Digitorum Profundus Muscle

Cysticercosis of the Flexor Digitorum Profundus Muscle Producing Flexion Deformity of the Fingers

1993 ◽  
Vol 18 (3) ◽  
pp. 360-362 ◽  
Author(s):  
G. A. ANDERSON ◽  
S. M. CHANDI
Keyword(s):  
Inflammatory Response ◽  
Flexor Digitorum Profundus ◽  
Flexion Deformity ◽  
Flexor Muscle ◽  
Normal Range ◽  
Aged Woman ◽  
Vascular Compromise ◽  
Middle Aged Woman ◽  
Flexor Digitorum ◽  
Flexor Digitorum Profundus Muscle

Selective flexion deformity of the middle and ring fingers resembling a mild type of Volkmann’s contracture resulted from Cysticercus cellulosa infection within the deep flexor muscle of the forearm in a middle-aged woman. Excision of the fibrotic segment of the muscle and tenodesis of all the flexor profundus tendons restored normal range of motion to these fingers. Vascular compromise in addition to the inflammatory response to the infection were considered causes for the deformity. There is no previous report of this kind in the literature.

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