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Skeletal Muscles: Origins, Insertions, and Actions

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  • What is the origin, insertion, and action of the Deltoid muscle?

    Origin: Clavicle, acromion process
    Insertion: Diaphysis of humerus
    Action: Arm abduction

  • What is the origin, insertion, and action of the Biceps Brachii?

    Origin: Coracoid process
    Insertion: Radial tuberosity
    Action: Elbow flexion

  • What is the origin, insertion, and action of the Brachialis muscle?

    Origin: Distal humerus
    Insertion: Coronoid process
    Action: Lifts ulna with elbow flexion

  • What is the origin, insertion, and action of the Brachioradialis?

    Origin: Distal humerus
    Insertion: Styloid process of the radius
    Action: Lifts radius with elbow flexion

  • What is the origin, insertion, and action of the Tensor Fascia Latae?

    Origin: Iliac crest
    Insertion: Iliotibial tract
    Action: Steadies knee

  • What are the origin, insertion, and actions of the Rectus Femoris?

    Origin: Anterior iliac spine
    Insertion: Patella and tibial tuberosity
    Action: Extends knee, flexes thigh

  • What are the origin, insertion, and actions of the Vastus Lateralis?

    Origin: Greater trochanter
    Insertion: Patella and tibial tuberosity
    Action: Extends knee, flexes thigh

  • What are the origin, insertion, and actions of the Vastus Medialis?

    Origin: Diaphysis of femur
    Insertion: Patella and tibial tuberosity
    Action: Extends knee, flexes thigh

  • What is the origin, insertion, and action of the Sartorius muscle?

    Origin: Anterior iliac spine
    Insertion: Proximal tibia
    Action: Flexes, abducts, laterally rotates thigh

  • What is the origin, insertion, and action of the Gracilis muscle?

    Origin: Pubis, ischium
    Insertion: Medial tibia
    Action: Adducts thigh

  • What is the origin, insertion, and action of the Tibialis Anterior?

    Origin: Tibia
    Insertion: Medial cuneiform, 1st metatarsal
    Action: Dorsiflexion

  • What is the origin, insertion, and action of the Triceps Brachii?

    Origin: Posterior humerus
    Insertion: Olecranon process
    Action: Extends elbow

  • What are the origin, insertion, and actions of the Biceps Femoris?

    Origin: Ischial tuberosity
    Insertion: Fibula
    Action: Flexes knee, extends thigh

  • What are the origin, insertion, and actions of the Semitendinosus?

    Origin: Ischial tuberosity
    Insertion: Tibia
    Action: Flexes knee, extends thigh

  • What are the origin, insertion, and actions of the Semimembranosus?

    Origin: Ischial tuberosity
    Insertion: Tibia
    Action: Flexes knee, extends thigh

  • What is the origin, insertion, and action of the Gastrocnemius muscle?

    Origin: Distal femur
    Insertion: Calcaneus
    Action: Plantar flexion

  • What is the origin, insertion, and action of the Soleus muscle?

    Origin: Fibula, tibia
    Insertion: Calcaneus
    Action: Plantar flexion