Neurilemma - English Definition & Meaning

Definition

The neurilemma is the outermost sheath of a myelinated nerve fiber in the peripheral nervous system. Think of it as the nerve's personal bodyguard, providing protection and support. It’s formed by Schwann cells wrapping around the nerve axon. This layer is crucial for nerve regeneration after injury. Unlike nerve fibers in the central nervous system, peripheral nerves can often repair themselves thanks to the neurilemma. It's like having a built-in repair kit for your nerves! Without it, recovery from nerve damage would be much more difficult.

Etymology

The term 'neurilemma' combines 'neuro-' referring to nerves, with 'lemma' from the Greek word 'lēmma,' meaning rind or husk. It literally means 'nerve sheath.' The term reflects its function as a protective covering. Its coinage occurred in the 19th century as neuroanatomy advanced. The Greek root 'lemma' is also found in botanical terms describing plant coverings.

Related Words

Examples

• "The neurilemma aids in the regeneration of damaged peripheral nerves."
• "Schwann cells form the neurilemma around the axon."
• "A damaged neurilemma can hinder nerve repair."
• "The neurilemma is absent in nerve fibers within the brain."

Encouragement

Understanding the neurilemma helps appreciate the body's amazing self-repair mechanisms. Use this word when discussing nerve injuries or medical advancements! 💪 It's a great way to show off your knowledge in biology class. 🧠

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