Lesson 1Path of radial nerve in armpit and upper arm: links to armpit blood vessels, upper arm bone head, and latissimus dorsi muscleWe track the radial nerve in the armpit and upper arm, explaining its links to the armpit artery, upper arm bone head, latissimus dorsi muscle, and nearby tissue layers, focusing on squeeze spots, injury dangers, and paths for operations.
Relations to axillary artery and veinCourse around humeral head and neckRelations to latissimus dorsi and teres majorFascial tunnels and potential compression sitesSurgical approaches in the proximal armLesson 2Main markers for finding it at bedside and during surgery: outer elbow bump, radial head, twist groove, supinator passageThis part points out sure surface and deep markers for finding the radial nerve and its branches, helping bedside checks, sound scans, and surgery around the outer elbow bump, radial head, twist groove, and supinator passage.
Palpation of lateral epicondyle and radial headLocating the spiral groove on the humerusIdentifying the supinator tunnel regionUltrasound landmarks for radial branchesSafe windows for surgical approachesLesson 3Key small-scale anatomy: outer nerve cover, middle nerve cover, inner nerve cover, nerve blood vessels and effects on injury and healingWe explain the small details of the radial nerve, like outer cover, middle cover, inner cover, and blood vessels, showing how they react to pull, squeeze, and cuts, and how they affect regrowth, lump formation, and fix methods.
Epineurial structure and surgical handlingPerineurium and fascicular organizationEndoneurial tubes and axonal supportVasa nervorum and ischemic vulnerabilityMicroanatomy and regeneration patternsLesson 4Brachial plexus starts and part in radial nerve (C5–T1): back cord making and body differencesThis part looks at how C5–T1 starts make the back cord and radial nerve, pointing out space links in the neck and armpit, common body differences, and how these affect weakness, feeling loss, and electric test results.
C5–T1 root contributions to radial nerveTopography of trunks, divisions, and cordsPosterior cord formation and branching patternCommon root and cord anatomical variantsClinical impact of high or low root lesionsLesson 5Back interosseous nerve (PIN): going through supinator (Frohse arch), muscle branches to arm straighteners, usual branch patternWe look close at the back interosseous nerve, from entering the supinator and Frohse arch to muscle branches for arm straighteners, describing usual and different branch patterns and their role in one-sided weaknesses and operation plans.
Entry beneath ECRB to supinatorArcade of Frohse anatomy and variantsIntramuscular course within supinatorMotor branches to wrist and finger extensorsPatterns in selective PIN palsiesLesson 6Twist (radial) groove structure: spot next to upper arm bone, branches to triceps and anconeus, blood linksThis part checks the twist groove part, describing its spot on the back upper arm bone, links to triceps and anconeus branches, nearby blood parts, and why this area is open to breaks, traps, and surgery risks.
Surface and radiographic localizationRelations to triceps and anconeus branchesContact with posterior humeral cortexRadial collateral and profunda brachii vesselsRisk zones in humeral shaft fracturesLesson 7End muscle and feeling areas: straightener section muscles, triceps, brachioradialis, anconeus, finger straighteners, and back hand feeling mapThis part maps end muscle and feeling areas, connecting each radial nerve branch to certain straightener muscles, triceps, brachioradialis, anconeus, and back hand skin spots, to help exact bedside finding and electric test reading.
Motor map of triceps and anconeusInnervation of wrist and finger extensorsBrachioradialis and ECRL innervation zonesDorsal hand and thumb sensory territoriesPatterns of overlap with median and ulnarLesson 8Common body differences affecting sickness signs: early split, extra branches, changing nerve supply to brachioradialis and ECUWe check common radial nerve body differences, like early split, extra branches, and changing supply to brachioradialis and ECU, stressing how these change sickness signs, nerve flow tests, and surgery hopes.
High radial bifurcation patternsAccessory branches to triceps or brachialisVariable innervation of brachioradialisECU and ECRB innervation variantsImpact on EMG and nerve conduction testsLesson 9Split at outer elbow/elbow: outer feeling branch and deep branch (back interosseous nerve) body detailsWe look at the radial nerve split near the outer elbow, comparing the outer feeling branch and deep muscle branch (PIN), their bundle setup, links to the radial head, and effects on traps, shots, and surgery release.
Anatomy at the lateral epicondyleBranching into superficial and deep branchesRelations to radial head and joint capsuleFascicular topography at the bifurcationEntrapment and iatrogenic injury risksLesson 10Arm path of outer branch: under skin route, branches to back of hand and snuffbox spotThis part follows the outer radial nerve along the arm, detailing its under-skin path, tissue layers, branches to the back of the hand and snuffbox spot, and how this structure guides feeling tests, blocks, and surgery cuts.
Course deep to brachioradialisTransition to subcutaneous positionBranches to dorsum of hand and fingersAnatomic snuffbox relations and branchesSites of Wartenberg syndrome compression
