{
    "@context": "https://schema.org",
    "@type": "Dataset",
    "name": "M. Brachialis — surface EMG electrode placement",
    "id": "brachialis_l",
    "slug": "brachialis-l",
    "url": {
        "en": "https://emgguide.de/muscle/brachialis-l",
        "de": "https://emgguide.de/de/muscle/brachialis-l",
        "viewer3d": "https://emgguide.de/?muscle=brachialis_l",
        "json": "https://emgguide.de/muscle/brachialis-l.json"
    },
    "names": {
        "latin": "M. Brachialis",
        "en": "Brachialis",
        "de": "Armbeuger"
    },
    "side": "left",
    "region": {
        "key": "UPPER_ARM",
        "en": "Upper Arm",
        "de": "Oberarm"
    },
    "placementStandard": "adapted from peer-reviewed literature (see source)",
    "source": {
        "url": "https://doi.org/10.3389/fphys.2021.809422",
        "short": "Date et al. 2021",
        "citation": "Date S, Kurumadani H, Nakashima Y, Ishii Y, Ueda A, Kurauchi K, Sunagawa T. Brachialis muscle activity can be measured with surface electromyography: a comparative study using surface and fine-wire electrodes. Front Physiol. 2021;12:809422."
    },
    "electrode": {
        "position": {
            "en": "In the distal third of the upper arm where the muscle becomes superficial - two to three fingerbreadths lateral to the line from acromion to cubital fossa, clear of biceps and triceps",
            "de": "Im distalen Oberarmdrittel, wo der Muskel seitlich unter dem Biceps hervortritt - zwei bis drei Querfinger lateral der Linie Akromion-Ellenbeuge, abseits von Biceps und Triceps"
        },
        "orientation": {
            "en": "Along the muscle fibres, 2 cm inter-electrode distance",
            "de": "Entlang des Faserverlaufs, Elektrodenabstand 2 cm"
        },
        "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": "Elbow flexion (strongest elbow flexor, independent of pronation/supination)",
            "de": "Flexion im Ellenbogengelenk (stärkster Ellenbogenbeuger, unabhängig von Pro-/Supination)"
        },
        "origin": {
            "en": "Distal half of the anterior humerus",
            "de": "Distale Hälfte des Humerus anterior"
        },
        "insertion": {
            "en": "Ulnar tuberosity, coronoid process",
            "de": "Tuberositas ulnae, Processus coronoideus"
        },
        "innervation": {
            "en": "Musculocutaneous nerve (lateral cord), C5–C6; plus a small branch of the radial nerve",
            "de": "N. musculocutaneus (Fasciculus lateralis), C5–C6; zusätzlich ein kleiner Ast des N. radialis"
        }
    },
    "testMovement": {
        "en": "Elbow flexion against resistance with pronated forearm",
        "de": "Ellenbogenflexion gegen Widerstand bei proniertem Unterarm"
    },
    "placementNotes": null,
    "mvcTest": {
        "source": "Konrad P. The ABC of EMG. Noraxon; 2005, p. 31",
        "group": "biceps",
        "en": {
            "position": "Seated or kneeling in front of a bench, elbow at about 90°, forearm supinated.",
            "fixation": "Very stable fixation of elbow and trunk; the upper arm stays vertical at the side.",
            "resistance": "Rigid resistance under the wrist (strap to the floor, bar or manual), elbow flexion against it.",
            "control": "Use the latissimus dorsi test as a control exercise.",
            "note": "Without elbow and trunk fixation the effort leaks into the shoulder and the biceps never reaches its maximum."
        },
        "de": {
            "position": "Sitzend oder kniend vor einer Bank, Ellbogen etwa 90°, Unterarm supiniert.",
            "fixation": "Sehr stabile Fixierung von Ellbogen und Rumpf; der Oberarm bleibt senkrecht am Körper.",
            "resistance": "Starrer Widerstand unter dem Handgelenk (Gurt zum Boden, Stange oder manuell), Ellbogenflexion dagegen.",
            "control": "Als Kontrollübung den Latissimus-dorsi-Test mitlaufen lassen.",
            "note": "Ohne Ellbogen- und Rumpffixierung weicht die Kraft in die Schulter aus, der Biceps erreicht sein Maximum 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"
}