Superficial Back Flashcards
Innervation of Latissimus Dorsi
Thoracodorsal Nerve (C6-8)
Innervation of Trapezius
(S) C3-C4
(M) Accessory Nerve (CN XI)
Innervation of Levator Scapulae
(S) C3-C4
(M) Dorsal Scapular Nerve (Originating C4-C5)
Innervation of Rhomboids
(M) Dorsal Scapular Nerve (originates from C4-C5)
(S) C3-4
Innervation of Pectoralis Major
(M) Lateral and Medial Pectoralis Nerve
(originates: Clavicular Head C5-7, Sternocostal Head C8-T1)
Innervation of Pectoralis Minor
(M) Lateral and Medial Pectoralis Nerve
(originates: C5-T1)
Innervation of Serratus Anterior
(M) Long Thoracic Nerve
(originates from C5-C7)
Innervation of Subclavius
(M) Subclavian Nerve
(originates from C5-6)
Bony Landmarks for Latissimus Dorsi
Spinous Process of Thoracic Spine
Thoracolumbar Fascia
Illiac Crest
Floor of the Intertubercular Sulcus of the Humerus
Bony Landmarks Trapezius
Superior Nuchal Line
External Occipital Protuberance
Ligament Nuchal
Spinous Process of Cervical & Thoracic Spine
Clavicle
Acromion
Spine of Scapula
Bony Landmarks of Levator Scapulae
Transverse Process C1-C4
Superior Angle & Superomedial Boarder of Scapula
Bony Landmarks of Rhomboid
Minor: Ligament Nuchal
Spinous Process C7-T1
Major: Spinous Process T2-T5
Medial Boarder of Scap
Bony Landmarks of Pectoralis Major
Clavicle
Sternum
Costal Cartilages
Aponeurosis of the External Oblique
Lateral Lip of the Intertubercular Sulcus of Humerus
Bony Landmarks of Pectoralis Minor
Outer Surface of Ribs 3-5
Coracoid Process
Bony Landmarks of Serratus Anterior
Outer Surface & Superior Boarders of Ribs 1-10
Costal Surface of the Medial Boarder of the Scapula
Bony Landmarks of Subclavius
1st Rib & Cartilage
Undersurface of Clavicle
Actions of Latissimus Dorsi
Adduction
Extension
Medial/Internal Rotation
(Of Humerus)
Actions of Trapezius
Upper: Elevation & Upward Rotation
Mid: Retraction
Lower: Depress & Upward Rotation
Actions of Levator Scapulae
Elevate
Downward Rotation
(Of Scapulae)
Action of Rhomboids
Retraction
Elevation (Minor)
Downward Rotation
(Of Scapulae)
Actions of Pectoralis Major
Adduction
Flexion
Medial/Internal Rotation
(Of Humerus)
Sternocostal portion assists with extension of the flexed arm
Actions of Pectoralis Minor
Anterior Tilt of Scapula
Depression of Shoulder
Forced Inspiration
Actions of Serratus Anterior
Scapula Protraction
Upward Rotation of Scapula
Actions of Subclavius
Depression
Stabilizes
(Clavicle)
What are Extrinsic back muscles?
Which muscles are they?
What are their functions/actions?
Superficial = Limb Movement
Trapezius
Latissimus Dorsi
Levator Scapula
Rhomboids
Intermediate = Respiration
Serratus Posterior Superior
Serratus Posterior Inverior
What are Intrinsic Back Muscles?
What muscles are they?
Function?
Function = Vertebral Column Movement & Stabilization
Superficial: Splenius (Capitus & Cervics)
Intermediate: Erector Spinae (Spinalis, Longissimus, Iliocostalis)
Deep: Transversospinales (Semispinalis, Multifidus, Rotatores)
