The rabbit brachial plexus as a model for nerve repair surgery--histomorphometric analysis

Area of Science:

• Neuroscience
• Anatomy
• Research Methodology

Background:

• Brachial plexus avulsion is a severe upper limb injury.
• Understanding brachial plexus microanatomy is crucial for injury research.
• The rabbit brachial plexus shares anatomical similarities with the human counterpart.

Purpose of the Study:

• To conduct a detailed microanatomical investigation of the rabbit brachial plexus.
• To evaluate the rabbit brachial plexus as a potential research model for brachial plexus injury studies.

Main Methods:

• Histomorphometric analysis of rabbit brachial plexus components (spinal nerves C5-Th1, trunks, peripheral nerve).
• Assessment of axon diameter, fiber diameter, and myelin sheath characteristics.
• Quantitative analysis of axon count, nerve area, myelin fiber density, and minimal diameters.

Main Results:

• Statistically significant differences were observed in myelin sheath, axon diameter, and fiber diameter between nerve segments.
• The g-ratio was found to be consistent between the brachial plexus and peripheral nerves.
• Key microstructural parameters peaked in nerve trunks and decreased towards peripheral nerves.

Conclusions:

• The rabbit brachial plexus exhibits distinct microanatomical features relevant to injury research.
• The rabbit model demonstrates potential for investigating brachial plexus injuries due to anatomical and microstructural characteristics.
• Further research utilizing this model can advance understanding and treatment of brachial plexus avulsion.