{
    "@context": "https://schema.org",
    "@type": "Dataset",
    "name": "M. Trapezius Pars Transversa — surface EMG electrode placement",
    "id": "trapezius_transversus_l",
    "slug": "trapezius-transversus-l",
    "url": {
        "en": "https://emgguide.de/muscle/trapezius-transversus-l",
        "de": "https://emgguide.de/de/muscle/trapezius-transversus-l",
        "viewer3d": "https://emgguide.de/?muscle=trapezius_transversus_l",
        "json": "https://emgguide.de/muscle/trapezius-transversus-l.json"
    },
    "names": {
        "latin": "M. Trapezius Pars Transversa",
        "en": "Middle Trapezius",
        "de": "Mittlerer Trapezmuskel"
    },
    "side": "left",
    "region": {
        "key": "SHOULDER",
        "en": "Shoulder",
        "de": "Schulter"
    },
    "placementStandard": "SENIAM (Hermens et al. 2000)",
    "source": {
        "url": "http://seniam.org/trapeziustransversalis.html",
        "short": "SENIAM (Hermens 2000)",
        "citation": "Hermens HJ, Freriks B, Disselhorst-Klug C, Rau G. Development of recommendations for SEMG sensors and sensor placement procedures. J Electromyogr Kinesiol. 2000;10(5):361-74."
    },
    "electrode": {
        "position": {
            "en": "50% between medial scapular border and T3",
            "de": "50% zwischen medialem Scapularand und T3"
        },
        "orientation": {
            "en": "Along the line T5–acromion",
            "de": "Richtung Linie T5–Acromion"
        },
        "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": "Retraction (adduction) of scapula, scapular stabilization",
            "de": "Retraktion (Adduktion) der Scapula, Stabilisierung des Schulterblatts"
        },
        "origin": {
            "en": "Proc. spinosi Th1–Th4",
            "de": "Proc. spinosi Th1–Th4"
        },
        "insertion": {
            "en": "Acromion, spine of scapula (medial)",
            "de": "Acromion, Spina scapulae (medial)"
        },
        "innervation": {
            "en": "Spinal accessory nerve (spinal portion) with twigs from C3–C4",
            "de": "N. accessorius (Pars spinalis) mit Ästen aus C3–C4"
        }
    },
    "testMovement": {
        "en": "Retract scapulae against resistance (squeeze shoulder blades together)",
        "de": "Schulterblätter zusammenziehen gegen Widerstand (Retraktion)"
    },
    "placementNotes": {
        "source": "Criswell E. Cram's Introduction to Surface Electromyography. 2nd ed. Jones & Bartlett; 2011, p. 292",
        "site": "Interscapular (Middle Trapezius)",
        "placementType": "quasi-specific",
        "signalCheck": {
            "de": "Schulterblätter zusammenziehen; Arme über den vollen Bewegungsumfang abduzieren.",
            "en": "Retract the scapulae; abduct the arms through the full range."
        },
        "crosstalk": {
            "de": [
                "Rhomboiden (nach Criswell kaum vom Signal zu trennen)",
                "oberer Trapezius",
                "Levator scapulae",
                "Erector spinae"
            ],
            "en": [
                "rhomboids (hard to separate from the signal per Criswell)",
                "upper trapezius",
                "levator scapulae",
                "erector spinae"
            ]
        },
        "artifacts": null
    },
    "mvcTest": {
        "source": "Konrad P. The ABC of EMG. Noraxon; 2005, p. 31",
        "group": "scapula_retraction",
        "en": {
            "position": "Prone on a bench, arms hanging, or seated at a rowing machine / cable.",
            "fixation": "Seated: good chest support; prone: the bench itself.",
            "resistance": "Barbell or bilateral manual resistance (prone) or cable/machine (seated); horizontal abduction against it.",
            "control": "—",
            "note": "Horizontal abduction addresses the shoulder-stabilising muscles: middle trapezius and rhomboids together."
        },
        "de": {
            "position": "Bauchlage auf der Bank mit hängenden Armen oder sitzend am Rudergerät / Seilzug.",
            "fixation": "Sitzend: gute Brustabstützung; Bauchlage: die Bank selbst.",
            "resistance": "Hantelstange oder beidseitiger manueller Widerstand (Bauchlage) bzw. Seilzug/Gerät (sitzend); horizontale Abduktion dagegen.",
            "control": "—",
            "note": "Die horizontale Abduktion adressiert die schulterstabilisierenden Muskeln: mittlerer Trapezius und Rhomboiden gemeinsam."
        }
    },
    "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"
}