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Related Concept Videos

Muscles that Move the Leg01:23

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The movement of the legs is facilitated by numerous muscles located within the anterior, medial, and posterior compartments of the thigh.
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Unlike mitosis, meiosis aims for genetic diversity in its creation of haploid gametes. Dividing germ cells first begin this process in prophase I, where each chromosome—replicated in S phase—is now composed of two sister chromatids (identical copies) joined centrally.
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Crossing over is the exchange of genetic information between homologous chromosomes during prophase I of meiosis I. Genetic recombination gives rise to allelic diversity in the newly formed daughter cells. In humans, crossing over produces genetically distinct haploid egg and sperm cells that undergo fertilization to produce unique offspring. Before cell division starts, the germ cell’s chromosome(s) undergo duplication in the S phase of the cell cycle. As the cells enter prophase I,...
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The work done by an external force on a particle changes its kinetic energy. However, internal forces must also be considered for a system of interacting particles. The potential energy formulation helps formulate the effect of internal forces. The net work done by an external force can be written in terms of the total change of mechanical energy, which includes both kinetic and potential energies.
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In cross-sectional research, a researcher compares multiple segments of the population at the same time. If they were interested in people's dietary habits, the researcher might directly compare different groups of people by age. Instead of following a group of people for 20 years to see how their dietary habits changed from decade to decade, the researcher would study a group of 20-year-old individuals and compare them to a group of 30-year-old individuals and a group of 40-year-old...
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Related Experiment Video

Updated: Feb 4, 2026

The Superficial Inferior Epigastric Artery Fascia Flap for Nerve Reconstruction in Rabbits
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[External fixation in reconstructive surgery: crossed leg flap.]

Andrés Aguilar Ezquerra1, Valentin Yuste Benavente, Elena Jordan Palomar

  • 1Hospital universitario Miguel Servet. aaguilarez@gmail.com.

Revista De La Facultad De Ciencias Medicas (Cordoba, Argentina)
|October 9, 2018
PubMed
Summary

For lower limb coverage defects where free flaps fail, the crossed leg flap offers a viable solution. This technique, stabilized with external fixation, allows patients to regain mobility.

Keywords:
crossed leg flapexternal fixator

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Area of Science:

  • Orthopedic Surgery
  • Plastic Surgery
  • Reconstructive Surgery

Background:

  • Lower limb coverage defects often compromise vascular pedicles, precluding free flap reconstruction.
  • Complex lower limb injuries may necessitate multiple surgical interventions, further complicating reconstructive options.

Observation:

  • Two patients with extensive lower limb soft tissue defects, unsuitable for microvascularized free flap reconstruction due to prior surgeries, were treated.
  • A crossed leg flap procedure was employed, with both lower limbs stabilized using an external fixator.

Findings:

  • The crossed leg flap procedure resulted in satisfactory recovery for both patients.
  • Patients were able to return to ambulation without requiring external assistance post-procedure.

Implications:

  • External fixation-stabilized crossed leg flaps represent a valuable alternative for managing challenging lower limb soft tissue defects.
  • This reconstructive technique can restore function and mobility in cases where conventional methods are not feasible.