{
    "@context": "https://schema.org",
    "@type": "Dataset",
    "name": "M. Adductor Magnus — surface EMG electrode placement",
    "id": "adductor_magnus_l",
    "slug": "adductor-magnus-l",
    "url": {
        "en": "https://emgguide.de/muscle/adductor-magnus-l",
        "de": "https://emgguide.de/de/muscle/adductor-magnus-l",
        "viewer3d": "https://emgguide.de/?muscle=adductor_magnus_l",
        "json": "https://emgguide.de/muscle/adductor-magnus-l.json"
    },
    "names": {
        "latin": "M. Adductor Magnus",
        "en": "Adductor Magnus",
        "de": "Großer Adduktor"
    },
    "side": "left",
    "region": {
        "key": "HIP",
        "en": "Hip",
        "de": "Hüfte"
    },
    "placementStandard": "adapted from peer-reviewed literature (see source)",
    "source": {
        "url": "https://doi.org/10.26773/mjssm.200904",
        "short": "Elsais et al. 2020",
        "citation": "Elsais WM, Preece SJ, Jones RK, Herrington L. Could relative movement between the adductor muscles and the skin invalidate surface electromyography measurement? Monten J Sports Sci Med. 2020;9(2):21-26."
    },
    "electrode": {
        "position": {
            "en": "At 60% of the distance from the greater trochanter to the lateral knee joint line, in the middle of the muscle belly between the posterior border of gracilis and the anterior border of the medial hamstrings",
            "de": "Auf Höhe von 60 % der Strecke vom Trochanter major zur lateralen Kniegelenkslinie, mittig auf dem Muskelbauch zwischen dem hinteren Rand des M. gracilis und dem vorderen Rand der medialen ischiocruralen Muskulatur"
        },
        "orientation": {
            "en": "Along the muscle fibres, 2 cm inter-electrode distance. Borders were located by ultrasound in the source - without ultrasound this is an approximation and crosstalk from adjacent adductors is possible",
            "de": "Entlang des Faserverlaufs, Elektrodenabstand 2 cm. Grenzen im Original per Ultraschall bestimmt - ohne Ultraschall Näherung, Übersprechen der Nachbaradduktoren möglich"
        },
        "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": "Hip adduction, anterior fibers: flexion, posterior fibers: extension and internal rotation",
            "de": "Adduktion im Hüftgelenk, vordere Anteile: Flexion, hintere Anteile: Extension und Innenrotation"
        },
        "origin": {
            "en": "Inferior ramus of the pubis, ramus of the ischium, ischial tuberosity",
            "de": "Ramus inferior ossis pubis, Ramus ossis ischii, Tuber ischiadicum"
        },
        "insertion": {
            "en": "Linea aspera (medial lip), medial epicondyle of the femur (adductor tubercle)",
            "de": "Linea aspera (Labium mediale), Epicondylus medialis des Femurs (Tuberculum adductorium)"
        },
        "innervation": {
            "en": "Adductor portion: obturator nerve, L2–L5; hamstring portion: tibial division of the sciatic nerve, L4–L5",
            "de": "Adduktorenteil: N. obturatorius, L2–L5; ischiokruraler Teil: Tibialisanteil des N. ischiadicus, L4–L5"
        }
    },
    "testMovement": {
        "en": "Thigh adduction against resistance",
        "de": "Adduktion des Oberschenkels gegen Widerstand"
    },
    "placementNotes": {
        "source": "Criswell E. Cram's Introduction to Surface Electromyography. 2nd ed. Jones & Bartlett; 2011, p. 367",
        "site": "Hip Adductor (Adductor Longus/Gracilis)",
        "placementType": "group",
        "signalCheck": {
            "de": "Knie zusammenpressen (Adduktion); Gehen.",
            "en": "Press the knees together (adduction); walking."
        },
        "crosstalk": {
            "de": [
                "Adductor longus und Gracilis — Criswell beschreibt für die Adduktoren nur diese Gruppen-Site, keine Position für den Magnus allein",
                "Vastus medialis",
                "ischiokrurale Muskulatur"
            ],
            "en": [
                "adductor longus and gracilis — Criswell describes only this group site for the adductors, no separate position for the magnus",
                "vastus medialis",
                "hamstrings"
            ]
        },
        "artifacts": null
    },
    "mvcTest": {
        "source": "Konrad P. The ABC of EMG. Noraxon; 2005, p. 32",
        "group": "adductors",
        "en": {
            "position": "Supine or seated with flexed legs; a big, stiff roll cushion is pressed between the knees.",
            "fixation": "The cushion itself provides the rigid resistance; pelvis stable.",
            "resistance": "Isometric adduction against the cushion.",
            "control": "—",
            "note": "Konrad tests the adductors as one group (\"Mm. adductores\"); surface EMG does not separate longus, magnus and gracilis."
        },
        "de": {
            "position": "Rückenlage oder sitzend mit gebeugten Beinen; ein großes, steifes Rollkissen wird zwischen den Knien zusammengedrückt.",
            "fixation": "Das Kissen liefert selbst den starren Widerstand; Becken stabil.",
            "resistance": "Isometrische Adduktion gegen das Kissen.",
            "control": "—",
            "note": "Konrad testet die Adduktoren als eine Gruppe („Mm. adductores\"); Oberflächen-EMG trennt Longus, Magnus und Gracilis nicht."
        }
    },
    "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"
}