Back Flashcards
What muscles make up the Superficial layer of the back? What doe they do?
Trapezius, latissimus dorsi, levator scapulae, rhomboid major, rhomboid minor
Move Shoulder
What muscles make up the intermediate layer of the back? What do they do?
serratus posterior superior and serratus posterior inferior
ACCESSORY respiratory muscles (use when breathing heavily)
What muscles make up the deep layer of the back? What do they do?
Erector Spinae Group: iliocostalis, longissimus, semispinalis
Move spine
What makes up the axial skeleton?
skull vertebral column sacrum ribs sternum
What makes up the appendicular skeleton?
clavicles scapulae upper extremities pelvis lower extremities
Where are the axial-to-appendicular connections?
sternoclavicular joints sacroiliac joints
Trapezius muscle proximal attachment
- Proximal attachment: external occipital protuberance, nuchal ligament, spinous process of C7 to T12
Trapezius muscle parts
- Superior part: attaches to lateral 1/3 of clavicle; elevates scapula
- Middle part: attaches to acromion and spine of scapula; retracts scapula
- Inferior part: attaches to medial end of spine of scapula; depresses scapula
Trapezius muscle innervation
- Innervation: accessory nerve (CN XI)(motor innervation); branches of ventral rami of spinal nerves C3 and C4 (sensory/proprioception innervation)
Trapezius muscle blood supply
- Arterial supply: transverse cervical artery
Latissimus Dorsi muscle proximal and distal attachment
- Proximal attachment: spines of vertebrae T7 to T12, iliac crest, thoracolumbar fascia, ribs 9 to 12, lateral to their angles
- Distal attachment: humerus (intertubercular sulcus)
latissimus dorsi innervation
- Innervation: thoracodorsal nerve
latissimus dorsi arterial supply
- Arterial supply: thoracodorsal artery
latissimus dorsi function
- Function: extends, adducts, rotates humerus medially
Rhomboid major and rhomboid minor muscles proximal/distal attachments
-
Rhomboid minor:
- Proximal attachment: nuchal ligament, spinous process of C7 and T1
- Distal attachment: medial border of scapula
-
Rhomboid major:
- Proximal attachment: spinous process of T2 to T5
- Distal attachment: medial border of the scapula