{
    "@context": "https://schema.org",
    "@type": "Dataset",
    "name": "M. Extensor Carpi Radialis Longus — surface EMG electrode placement",
    "id": "extensor_carpi_radialis_longus_r",
    "slug": "extensor-carpi-radialis-longus-r",
    "url": {
        "en": "https://emgguide.de/muscle/extensor-carpi-radialis-longus-r",
        "de": "https://emgguide.de/de/muscle/extensor-carpi-radialis-longus-r",
        "viewer3d": "https://emgguide.de/?muscle=extensor_carpi_radialis_longus_r",
        "json": "https://emgguide.de/muscle/extensor-carpi-radialis-longus-r.json"
    },
    "names": {
        "latin": "M. Extensor Carpi Radialis Longus",
        "en": "Extensor Carpi Radialis Longus",
        "de": "Langer radialer Handstrecker"
    },
    "side": "right",
    "region": {
        "key": "FOREARM",
        "en": "Forearm",
        "de": "Unterarm"
    },
    "placementStandard": "adapted from peer-reviewed literature (see source)",
    "source": {
        "url": "https://doi.org/10.1016/S1050-6411(00)00017-1",
        "short": "Riek & Carson 2000",
        "citation": "Riek S, Carson RG. A new technique for the selective recording of extensor carpi radialis longus and brevis EMG. J Electromyogr Kinesiol. 2000;10(4):249-57."
    },
    "electrode": {
        "position": {
            "en": "30% on line from lateral epicondyle to Proc. styloideus radii",
            "de": "30% auf Linie vom lateralen Epicondylus zum Proc. styloideus radii"
        },
        "orientation": {
            "en": "Parallel to the radius",
            "de": "Parallel zum Radius"
        },
        "sensorRules": "bipolar Ag/AgCl, ≤ 10 mm conductive diameter, 20 mm inter-electrode distance, parallel to fibres, reference electrode on bone (SENIAM)"
    },
    "landmarks": null,
    "anatomy": {
        "function": {
            "en": "Wrist dorsiflexion and radial abduction",
            "de": "Dorsalextension und Radialabduktion im Handgelenk"
        },
        "origin": {
            "en": "Lateral supracondylar ridge of the humerus",
            "de": "Crista supracondylaris lateralis des Humerus"
        },
        "insertion": {
            "en": "Base of the 2nd metacarpal (dorsal)",
            "de": "Basis des Os metacarpale II (dorsal)"
        },
        "innervation": {
            "en": "Radial nerve (posterior cord), C6–C7",
            "de": "N. radialis (Fasciculus posterior), C6–C7"
        }
    },
    "testMovement": {
        "en": "Fist closure with wrist dorsiflexion and radial abduction against resistance",
        "de": "Faustschluss mit Dorsalextension und Radialabduktion gegen Widerstand"
    },
    "placementNotes": {
        "source": "Criswell E. Cram's Introduction to Surface Electromyography. 2nd ed. Jones & Bartlett; 2011, p. 325",
        "site": "Extensor Carpi Radialis (Longus and Brevis)",
        "placementType": "quasi-specific",
        "signalCheck": {
            "de": "Handgelenk strecken und radial abduzieren.",
            "en": "Wrist extension and radial deviation."
        },
        "crosstalk": {
            "de": [
                "Brachioradialis",
                "Extensor digitorum"
            ],
            "en": [
                "brachioradialis",
                "extensor digitorum"
            ]
        },
        "artifacts": null
    },
    "mvcTest": {
        "source": "Konrad P. The ABC of EMG. Noraxon; 2005, p. 31",
        "group": "forearm_extensors",
        "en": {
            "position": "Seated or kneeling in front of a bench with the forearm resting on a stable support.",
            "fixation": "Forearm fully supported; wrist free to work against the resistance.",
            "resistance": "Manual resistance, a barbell or a cable/belt against the wrist or hand.",
            "control": "Use the latissimus dorsi and pectoralis major tests as control exercises.",
            "note": "Konrad treats the forearm flexors and extensors as one group; wrist flexion for the flexors, wrist extension for the extensors."
        },
        "de": {
            "position": "Sitzend oder kniend vor einer Bank, der Unterarm liegt auf einer stabilen Unterlage.",
            "fixation": "Unterarm vollständig aufgelegt; das Handgelenk arbeitet frei gegen den Widerstand.",
            "resistance": "Manueller Widerstand, Hantelstange oder Seilzug/Gurt gegen Handgelenk oder Hand.",
            "control": "Als Kontrollübungen die Tests für Latissimus dorsi und Pectoralis major mitlaufen lassen.",
            "note": "Konrad fasst Unterarm-Flexoren und -Extensoren als eine Gruppe: Handgelenksflexion für die Flexoren, Handgelenksextension für die Extensoren."
        }
    },
    "measurability": "surface EMG",
    "license": "Free to cite with attribution to emgguide.de. Electrode placements based on SENIAM (Hermens et al. 2000) and the cited literature; not an official SENIAM product; not a substitute for medical advice.",
    "publisher": {
        "name": "EMG Guide (menios GmbH)",
        "url": "https://emgguide.de/"
    },
    "dateModified": "2026-10-21"
}