In a cross-section of a peripheral nerve, which layer of connective tissue directly invests each individual nerve fiber?
- A Epineurium
- B Perineurium
- C Endoneurium ✓
- D Mesoneurium
Correct answer: C. Endoneurium
Explanation
The endoneurium is the innermost connective tissue layer of a peripheral nerve and directly surrounds each individual myelinated or unmyelinated nerve fiber along with its Schwann cell sheath. Perineurium (containing myofibroblasts) surrounds fascicles, forming the blood-nerve barrier analogous to the blood-brain barrier. Epineurium is the outermost layer encasing the entire nerve trunk.
Reference: BD Chaurasia's Human Anatomy, 8th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.