Lesson 1Path of Radial Nerve in Axilla and Upper Arm: Links to Axillary Vessels, Humeral Head, and Latissimus DorsiIn this part, we trace the radial nerve through the axilla and upper arm, explaining its connections to the axillary artery, humeral head, latissimus dorsi, and nearby tissues, focusing on pressure points, injury risks, and paths for surgical access in local practices.
Links to axillary artery and veinPath around humeral head and neckLinks to latissimus dorsi and teres majorTissue tunnels and possible pressure spotsSurgical methods in upper armLesson 2Main Markers for Bedside Location and Surgical Access: Lateral Epicondyle, Radial Head, Spiral Groove, Supinator TunnelThis part points out dependable surface and inner markers for finding the radial nerve and its branches, helping with bedside exams, ultrasound, and surgical access near the lateral epicondyle, radial head, spiral groove, and supinator tunnel in Eritrean clinics.
Feeling lateral epicondyle and radial headFinding spiral groove on humerusSpotting supinator tunnel areaUltrasound markers for radial branchesSafe areas for surgical methodsLesson 3Key Tiny Anatomy: Epineurium, Perineurium, Endoneurium, Vasa Nervorum and Effects on Injury and HealingWe explain the tiny structure of the radial nerve, covering epineurium, perineurium, endoneurium, and blood vessels, showing how these parts react to stretching, pressing, and cutting, and how they affect regrowth, lump formation, and repair methods in Eritrean settings.
Epineurial build and surgical carePerineurium and bundle setupEndoneurial tubes and fiber supportVasa nervorum and blood shortage risksTiny anatomy and healing waysLesson 4Brachial Plexus Roots and Role in Radial Nerve (C5–T1): Posterior Cord Build and Body VariationsThis part looks at how C5–T1 roots make the posterior cord and radial nerve, noting space links in the neck and axilla, common body variations, and how these affect weakness, feeling loss, and electrical tests in local patients.
C5–T1 root roles in radial nerveLayout of trunks, splits, and cordsPosterior cord build and branch patternUsual root and cord body variationsClinical effects of high or low root damagesLesson 5Posterior Interosseous Nerve (PIN): Entry Through Supinator (Frohse Arcade), Motor Branches to Forearm Extensors, Usual Branch PatternHere we look closely at the posterior interosseous nerve, from entering the supinator and Frohse arcade to its motor branches for forearm extensors, describing usual and varied branch patterns and their part in specific weaknesses and surgery planning.
Entry under ECRB to supinatorFrohse arcade structure and variationsPath inside supinator muscleMotor branches to wrist and finger extensorsPatterns in specific PIN weaknessesLesson 6Spiral (Radial) Groove Structure: Place Relative to Humerus, Branches to Triceps and Anconeus, Blood Vessel LinksThis part studies the spiral groove area, describing its spot on the back humerus, links to triceps and anconeus branches, nearby blood structures, and why this area is at risk in breaks, trapping, and surgery in Eritrean care.
Surface and x-ray locationLinks to triceps and anconeus branchesTouch with back humeral boneRadial collateral and deep arm vesselsRisk areas in humeral shaft breaksLesson 7Ending Motor and Feeling Areas: Extensor Group Muscles, Triceps, Brachioradialis, Anconeus, Finger Extensors, and Back Hand Feeling MapThis part maps ending motor and feeling areas, connecting each radial nerve branch to certain extensor muscles, triceps, brachioradialis, anconeus, and back hand skin zones, to aid exact bedside location and electrical reading in clinics.
Motor map of triceps and anconeusSupply to wrist and finger extensorsBrachioradialis and ECRL supply zonesBack hand and thumb feeling areasPatterns of overlap with median and ulnarLesson 8Common Body Variations Affecting Clinical Signs: High Split, Extra Branches, Varied Supply to Brachioradialis and ECUWe look at common radial nerve body variations, like high split, extra branches, and varied supply to brachioradialis and ECU, stressing how these change clinical signs, nerve tests, and surgery hopes in Eritrean patients.
High radial split patternsExtra branches to triceps or brachialisVaried supply to brachioradialisECU and ECRB supply variationsEffects on EMG and nerve testsLesson 9Split at Lateral Epicondyle/Elbow: Surface Feeling Branch and Deep Branch (Posterior Interosseous Nerve) Body DetailsWe study the radial nerve split near the lateral epicondyle, comparing the surface feeling branch and deep motor branch (PIN), their bundle setup, links to radial head, and effects for trapping, shots, and surgery relief.
Structure at lateral epicondyleSplit into surface and deep branchesLinks to radial head and joint coverBundle layout at splitTrapping and treatment injury risksLesson 10Forearm Path of Surface Branch: Under Skin Route, Branches to Back of Hand and Snuffbox AreaThis part traces the surface radial nerve along the forearm, detailing its under-skin path, tissue layers, branches to back hand and snuffbox, and how this structure guides feeling tests, blocks, and surgery cuts in practice.
Path deep to brachioradialisShift to under-skin spotBranches to back hand and fingersSnuffbox links and branchesSpots of Wartenberg syndrome pressure
