Peripheral Nervous System

The peripheral nervous system comprises all neural structures beyond the brain and spinal cord, including sensory, motor and autonomic fibres that connect the central nervous system to receptors and effector organs. Peripheral nerves arise as mixed spinal nerves that divide into dorsal and ventral rami, forming networks such as the cervical, brachial and lumbosacral plexi. Within each nerve, axons are ensheathed by myelin produced by Schwann cells and bundled by connective tissue sheaths that maintain structural integrity and permit sliding during movement. The PNS transmits sensory modalities—touch, proprioception, nociception—and executes voluntary motor commands while regulating involuntary functions via sympathetic and parasympathetic pathways. Advances in imaging, electrophysiology and molecular biology have deepened understanding of nerve development, injury mechanisms and regeneration, informing novel diagnostic and therapeutic approaches. Peripheral nervous system disorders—including compressive neuropathies, traumatic injuries and immune-mediated demyelination—pose significant global health challenges owing to their impact on mobility, sensation and quality of life.

Research from Nature Portfolio

Detailed anatomical mapping of hindfoot structures has defined consistent relationships between tendon transfer sites and plantar nerve branches, informing minimally invasive harvesting techniques that reduce risk of medial and lateral plantar nerve injury. Complementary cadaveric work on dual-incision decompression for chronic exertional compartment syndrome has delineated the path of the superficial peroneal nerve, guiding incision placement to preserve neural continuity while achieving effective fascial release. These studies exemplify the application of high-resolution dissectional anatomy to refine surgical planning and safeguard peripheral nerve integrity.

Research from all publishers

Longitudinal magnetic resonance neurography of the sciatic nerve in early multiple sclerosis has uncovered progressive microstructural changes—elevated T2 relaxation times and altered proton density—despite stable central lesion load, highlighting under-appreciated peripheral nerve involvement and its potential as a non-invasive biomarker of disease activity. A review of myelin oligodendrocyte glycoprotein antibody-associated disease described a spectrum of combined central and peripheral demyelination, with variable sensory and motor presentations and heterogeneous responses to immunotherapy, emphasising the need for tailored diagnostic and treatment strategies. In focal nerve trauma, application of pulsed radiofrequency–enhanced transcutaneous electrical nerve stimulation in refractory foot drop achieved marked improvements in ankle dorsiflexion strength and gait without surgical intervention, suggesting a promising neuromodulation approach for peripheral motor recovery.

Peripheral Nervous System publication trend

The graph below shows the total number of articles in peripheral nervous system across all publications each year (not limited to Nature Index journals).

Technical terms

Demyelination: Loss of the insulating myelin sheath around axons, impairing neural conduction.

Schwann cell: Glial cell in the peripheral nervous system responsible for producing and maintaining myelin.

Magnetic resonance neurography: MRI technique optimised to visualise peripheral nerve structure and pathology.

Myelin oligodendrocyte glycoprotein: Surface protein on myelin targeted by autoantibodies in certain demyelinating disorders.

Transcutaneous electrical nerve stimulation (TENS): Delivery of low-voltage electrical currents through the skin to modulate peripheral nerve excitability.

Pulsed radiofrequency: Application of high-frequency electrical pulses to alter nerve function without tissue ablation.

References

1. Peripheral Nerve Anatomy.
2. Anatomical Study of the Neurovascular in Flexor Hallucis Longus Tendon Transfers. Scientific Reports (2017).
3. Dual-incision minimally invasive fasciotomy of the anterior and peroneal compartments for chronic exertional compartment syndrome of the lower leg. Scientific Reports (2020).
4. Combined Central and Peripheral Demyelination (CCPD) Associated with MOG Antibodies: Report of Four New Cases and Narrative Review of the Literature. Journal of Clinical Medicine (2024).