Superficial Back and Shoulder Flashcards
Trapezius Origins
External Occipital Protuberance (Skull) C1-T12 Spinous Processes
Insertions of Trapezius
(upper fibers) Medial Margin of the Clavicle (middle fibers) Medial Margin of the Acromion (lower fibers) Medial Margin of Scapular Spine
Trapezius Innervation
Subtrapezial Nerve Plexus (CN XI) C3 and C4 ventral Rami
Action of Trapezius
Move Shoulder Girdle
Origin of Levator Scapulae
C1-C4 Transverse Processes
Insertion of Levator Scapulae
Medial Border of Scapula (above scapular spine)
Innervation of Levator Scapulae
Dorsal Scapular Nerve
Action of Levator Scapulae
Move the Shoulder Girdle
Rhombiod Minor Origin
C7-T1 Spinous Processes
Rhombiod Minor Insertion
Medial Border of Scapula (at scapular spine)
Innervation of Rhombiod minor
Dorsal Scapular Nerve
Rhomboid Minor Action
Moves shoulder girdle
Rhomboid Major Origin
T2-T5 Spinous Processes
Insertion of Rhomboid Major
Medial Border of Scapulae (below scapular spine)
Innervation of Rhomboid Major
Dorsal Scapular Nerve
Action of Rhomboid Major
Move shoulder girdle
Latissimus Dorsi Origin
T6-L5 Spinous Process, Iliac Crest, Thoracolumbar Fascia
Insertion of Latissimus Dorsi
Intertubercular Groove of Humerous
Innervation of Latissimus Dorsi
Thracodorsal Nerve
Action of Latissimus Dorsi
Extend, Med. Rotate, adduction
First Vertebral Spine that is palpable
C7 = Vertebra prominens
Structure extending laterally from spine of scapula
acromion
Most lateral point of the shoulder articulating with the lateral end of the clavicle
acromion
Point where scapular spine reaches medial border of the scapula
T3
Inferior angle of Scapula is at…
T7
Primary function of Superficial Back Muscles
Movement of Shoulder girdle and Upper Limbs
Function of Middle Back Muscles
Inspiration
Function of Deep (intrinsic) Back Muscles
Movement of Vertebral Column
What nerve plexus and artery/vein are located deep to the trapezius
subtrapezial nerve plexus, transverse cervical artery and vein
What two structures form the axillary fold
teres major muscle and latissimus dorsi
Action of Serratus Anterior Fold
holds scapula against posterior chest wall and rotates the lateral angle of the scapula superiorly
Innervation of Serratus Anterior
thoracic nerve
Paralysis of Serratus Anterior results in…
Winged Scapula
Flexion and Extention of Vertebral Column and Neck
Flexion - Forward Bending Extention- Back bending
Superior and inferior rotation of Scapula
Superior Rotation - Hand above shoulder height
Gleniod Fossa Moves
Acromioclavicular joint
Gliding Joint
Only bony attahcment of scapula
Joins clavicle and scapula and forms shoulder with pectoral girdle
Includes Acromioclavicular ligament and Coracoacromial ligament

Movments of Acromioclavicular (AC) Joint
Anteroposterior planes, Verticle Planes, and Axial Rotation
Sternoclavicular Joint
Synovial (like AC)
Connects Clavicle to sternum
Sole Boney Articulation between Axial Skeleton and Upper Extremity
Gives up stability for mobility
Superior angle of Scapula is at the Same height as
T2
Action caused by solo contration of upper trapezius
elevation of scapula
If one retracts their scapula, what part of the trapezius is acting?
Middle fibers
Muscles acting in elevation
Upper Trapezius
Levator Scapulae
Muscles acting in Depression of Scapula
Lower Trapezius
Lower Serratus Anterior
Gravity
Muscles acting in protraction of scapula
Serratus Anterior
Pectoralis Minor
Muscles acting in retraction of the Scapula
Rhomboid Major
Rhomboid Minor
Middle Trapezius
Muscles involved in Superior Rotation of Lateral Angle of Scapula
Upper and Lower Trapezius
Inferior Rotation of Lateral Angle of Scapula caused by flexion of…
Levator Scapulae
Rhomboid Major
Rhombiod Minor
Gravity
Stability of the AC is provided by..
the Acromioclavicular Ligament and coracoclavicular ligament
Which ligament provided most of the weight bearing support for the UL on the clavicle?
Coracoclavicular ligament
Extrinsic muscles of the back are generally innervated by…
Peripheral nerves formed by the ventral rami of spinal nerves
Intrinsic Muscles of Deep are typically innervated by…
Dorsal rami and Spinal Nerves
Blood Supply to Latissimus Dorsi is supplied by…
Thoracodorsal Vessels