Upper Extremity Learning Objectives + Structure Information Flashcards
(62 cards)
Latissimus Dorsi bony attachments
From lower thoracic spinous processes, thoracolumbar fascia, & iliac crest to the floor of the intertubercular sulus of the humerus
Latissimus Dorsi actions
adduction, extension, medial rotation of humerus
Latissimus Dorsi innervation
thoracodorsal nerve
spinal segment: C6-C8
Levator Scapulae bony attachments
From transverse processes of C1-C4 to the superior angle & superomedial border of the scapula
Levator Scapulae actions
elevation & downward rotation of the scapula
Levator Scapulae innervation
dorsal scapular nerve (sensory branches of C3-C4)
spinal segment: C4-C5
Pectoralis Major bony attachments
from clavicle, costal cartilages, sternum, & aponeurosis of the external oblique to the lateral lip of the intertubercular sulcus of the humerus
Pectoralis Major actions
adduction, flexion, & medial rotation (sternocostal portion assists with extension of the flexed arm)
Pectoralis Major innervation
medial and lateral pectoral nerves
spinal segment: clavicular head C5-C7, sternocostal head C8-T1
Pectoralis Minor bony attachments
from outer surfaces of ribs 3-5 to the coracoid process of scapula
Pectoralis Minor actions
anterior tilt of scapula, assists with depression of the shoulder, & forced inspiration
Pectoralis Minor innervation
medial and lateral pectoral nerves
Spinal Segment: C5-T1
Rhomboids bony attachments
From ligamentum nuchae & spinous processes C7-T1 & T2-T5, to the medial border of the scapula
Rhomboids actions
scapular retraction, elevation (upper), downward rotation
Rhomboids innervation
dorsal scapular nerve (sensory: direct branches of C3-C4)
Spinal segment: C4-C5
Serratus anterior bony attachments
From the outer surfaces & superior borders of upper 8-10 ribs, to the costal surface of the medial border of the scapula
Serratus anterior actions
scapular protraction & upward rotation
Serratus anterior innervation
long thoracic nerve
spinal segment: C5-C7
Subclavius bony attachments
From 1st rib & cartilage to the undersurface of the clavicle
Subclavius actions
depresses and stabilizes the clavicle
Subclavius innervation
subclavian nerve
spinal segment: C5-C6
Trapezius bony attachments
From the superior nuchal line, external occipital protuberance, ligamentum nuchae, & cervical and thoracic spinous processes to the clavicle, acromion, & scapular spine
Trapezius actions
scapular elevation (upper), depression (lower), retraction (middle), upward rotation (upper & lower)
Trapezius innervation
accessory nerve (Cn XI; motor), C3-C4 sensory
spinal segment: accessory nerve (CN XI), C3-C4 sensory