Related Experiment Video
Updated: Jun 25, 2026

Simultaneous Pre- and Post-synaptic Electrophysiological Recording from Xenopus Nerve-muscle Co-cultures
Published on: March 11, 2013
[Mechanisms controlling axonal sprouting at the neuromuscular junction]
S d'Houtaud1, K Buffenoir, E Sztermer
1Service de neurochirurgie, CHU La-Milétrie, 2, rue de la Milétrie, BP 577, 86021 Poitiers cedex, France. samuel.dhoutaud@gmail.com
Axonal sprouting in partially denervated muscles is influenced by sprouting stimuli like insulin-like growth factor II and perisynaptic Schwann cells. Excessive or lacking neuromuscular activity can inhibit this crucial nerve regeneration process.
Area of Science:
- Neuroscience
- Muscle Biology
- Regenerative Medicine
Context:
- Partial denervation of skeletal muscle triggers axonal sprouting to reinnervate neuromuscular junctions.
- Understanding the molecular and cellular mechanisms governing axonal sprouting is vital for therapeutic interventions.
Purpose:
- To investigate the distinct roles of sprouting stimuli, perisynaptic Schwann cells, and neuromuscular activity in axonal sprouting.
- To elucidate how insulin-like growth factor II, Schwann cells, and neuromuscular activity modulate nerve regeneration.
Summary:
- Insulin-like growth factor II, produced by inactive muscle fibers, acts as a sprouting stimulus.
- Perisynaptic Schwann cells actively induce and guide axonal sprouting in denervated muscles.
- Both excessive and insufficient neuromuscular activity impede axonal sprouting by affecting Schwann cell bridging and nerve calcium influx.
Impact:
- Provides critical insights into the regulation of axonal sprouting at the neuromuscular junction.
- Identifies key factors that can be targeted to promote nerve regeneration after muscle injury or disease.
- Informs the development of strategies to enhance functional recovery in partially denervated muscles.
More Related Videos
12:18The Neuromuscular Junction: Measuring Synapse Size, Fragmentation and Changes in Synaptic Protein Density Using Confocal Fluorescence Microscopy
Published on: December 26, 2014
04:44Combined In Vivo Electroporation and Short-Term Reinnervation of the Cranial Levator Auris Longus Skeletal Muscle
Published on: November 1, 2024
Related Concept Videos
The Neuromuscular Junction
Neuromuscular Junction And Blockade
Relaxation of Skeletal Muscles
When an action potential reaches the axon terminal, it depolarizes the membrane and opens voltage-gated sodium channels. Sodium ions enter the cell, further depolarizing the presynaptic membrane. This depolarization causes voltage-gated calcium channels to open.
Muscle Contraction
Muscle Contraction
Motor Unit Stimulation
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...