Extrinsic Back Muscle POINA's Flashcards
Purposeful Activity of Latissimus Dorsi
-Propelling a manual wheelchair forward
-Using arms to help stand up from sitting
Origin of Latissimus Dorsi
Spinal Processes T 7-12
Thoracolumbar fascia
Iliac Crest
Ribs 9-12 or 10-12
7% of people have attachment to inferior angle of scapula
Insertion of Latissimus Dorsi
Floor of intertubercular sulcus of humerus
Action of Latissimus Dorsi
-Shoulder extension
-Shoulder internal rotation
-Shoulder adduction
Nerve innervation of Latissimus Dorsi
Thoracodorsal nerve
C6, C7, and C8
Purposeful Activity of Upper Trapezius
-Reaching for something overhead
Origin of Upper Trapezius
-Spinous processes of C7-T12
-External occipital protuberance
-Occiput’s Superior Nuchal Line
-Ligamentum nuchae
Insertion of Upper Trapezius
-Lateral 1/3 of clavicle
-Acromion of scapula
-Distal spine of scapula
Nerve Innervation of Upper Trapezius
-Spinal Accessory Nerve for motor (CN XI)
-Ventral rami for pain and proprioception (C3 and C4)
Action of Upper Trapezius
Bilaterally
-Head/neck extension
Unilaterally:
-Head/neck Ipsilateral lateral flexion
-Head/neck contralateral rotation
-Scapular Elevation
-Scapular Upward Rotation
Purposeful Activity of Middle Trapezius
Rowing a kayak
Origin of Middle Trapezius
-Spinous processes of C7-T12
-External occipital protuberance
-Occiput’s Superior Nuchal Line
-ligamentum nuchae
Insertion of Middle Trapezius
-Lateral 1/3 of clavicle
-Acromion of scapula
-Middle spine of scapula
Nerve Innervation of Middle Trapezius
-Spinal Accessory Nerve for motor (CN XI)
-Ventral rami for pain and proprioception (C3 and C4)
Action of Middle Trapezius
-Scapular Adduction/Retraction
-Scapular stabilization
Purposeful Activity of Lower Trapezius
Reaching Overhead