Quiz 1 (back and gluteal region)

Origin: The end attaching to the stable base which doesn’t move much or at all when the muscle is contracted – usually more Proximal VS. Insertion: Insertion: The end attaching to the ‘moving bone’ when the muscle is contracted – usually more Distal

Trapezius

Origin: occipital + ligamentum nuchae + thoracic vertebrae

Insertion: clavicle + acromion + spine (of scapula)

Innervation: spinal accessory n. (CN XI)

Levator scapulae

Origin: C1-C4

Insertion: scapula

Innervation: dorsal scapular n.

Rhomboid major/minor

Origin: ligamentum nuchae + thoracic vertebrae

Insertion: scapula

Innervation: dorsal scapular n.

Subscapularis

Origin: subscapular fossa (of scapula)

Insertion: lesser tubercle (of humerus)

Innervation: upper + lower subscapular nn.

Latissimus dorsi

Origin: thoracolumbar fascia + iliac crest

Insertion: intertubercular sulcus (of humerus)

Innervation: thoracodorsal n.

Serratus anterior

Origin: ribs

Insertion: scapula

Innervation: long thoracic n.

Erector spinae

Origin: sacrum + lumbar vertebrae + thoracic vertebrae + iliac crest

Insertion: thoracic vertebrae + cervical vertebrae + ribs

Innervation: lower cervical nn.

Gluteus maximus

Origin: ilium + sacrum + coccyx

Insertion: IT tract + gluteal tuberosity (of femur)

Innervation: inferior gluteal n.

Gluteus medius

Origin: ilium + gluteal fascia

Insertion: greater trochanter (of femur)

Innervation: superior gluteal n.

Gluteus minimus

Origin: ilium

Insertion: greater trochanter (of femur)

Innervation: superior gluteal n.

Piriformis

Origin: sacrum

Insertion: greater trochanter (of femur)

Innervation: sacral nn. 1-2

Obturator internus

Origin: margin of obturator foramen

Insertion: greater trochanter (of femur)

Innervation: N. to obturator internus

Superior gemellus

Origin: ischial spine

Insertion: greater trochanter (of femur) + obturator interus tendon

Innervation: N. to obturator internus

Inferior gemellus

Origin: ischial tuberosity

Insertion: greater trochanter (of femur) + obturator interus tendon

Innervation: N. to obturator internus

Quadratus femoris

Origin: ischial tuberosity

Insertion: intertrochanteric crest (of femur)

Innervation: N. to quadratus femoris