Thoracic Nerve Distribution !!install!! Jun 2026

| Nerve | Region | Key Motor Targets | Key Sensory (Dermatome) | | :--- | :--- | :--- | :--- | | | Superior thorax | Intercostals, hand muscles (via T1 contribution to brachial plexus) | Medial forearm/axilla | | T2 | 1st-2nd intercostal space | Intercostals | Upper chest, axilla (intercostobrachial nerve) | | T3-T6 | Upper thorax | External/internal intercostals | Anterior chest wall (nipple = T4) | | T7-T9 | Mid-lower thorax | Intercostals, serratus posterior inferior | Epigastrium (xiphoid = T6) | | T10 | Subcostal region | Abdominal obliques, transversus abdominis | Umbilicus (landmark) | | T11-T12 | Lower thorax/flank | Abdominal muscles, quadratus lumborum | Hypogastrium, inguinal region |

Table_title: Tables Table_content: header: | Spinal Component | Skin Distribution | row: | Spinal Component: T3 dermatome | Skin D... Medscape Thoraco-abdominal nerves - Wikipedia Diagram of the course and branches of a typical intercostal nerve. Intercostal nerves, the superficial muscles having been removed... Wikipedia Thoracic Spinal Nerves - Physiopedia Supply Areas. Thoracic spinal nerves serve the region thus: T1 and T2 (top two thoracic nerves) feed into nerves that go into the ... Physiopedia 12.6D: Intercostal Nerves - Medicine LibreTexts Oct 14, 2025 — thoracic nerve distribution

Each thoracic nerve communicates with the via: | Nerve | Region | Key Motor Targets

, which contributes to the brachial plexus); instead, they travel directly to the structures they innervate, primarily the chest and abdominal walls. Anatomical Branching Wikipedia Thoracic Spinal Nerves - Physiopedia Supply Areas