Superficial Back Muscles Flashcards
Latissimus dorsi
(attachment)
Attaches at:
- spinous processes of thoracic and lumbar vertebrae
- iliac crest
- lower ribs
AND:
-the intertubercular sulcus (bicipital groove) of the humerus
Latissimus dorsi
(innervation)
Thoracodorsal nerve (C6-C8)
Latissimus dorsi
(action)
Extends, Adducts, & Medially Rotates the arm
Trapezius-Ascending
(attachment)
Attaches at:
-spinous processes of thoracic vertebra
AND
-spine of scapula
Trapezius-Ascending
(innervation)
- spinal accessory nerve (motor C1-C5)
- anterior rami of C3&C4
Trapezius-Ascending
(Action)
depresses the scapula
(along with the descending–rotates the scapula superiorly)
Trapezius-Middle
(attachment)
Attaches at:
-spinous processes of thoracic vertebra
AND
-spine of scapula
Trapezius-Middle
(innervation)
spinal accessory nerve (motor of C1-C5)
AND
anterior rami of C3&C4
Trapezius-Middle
(action)
Retracts scapula
Trapezius-Descending
(attachment)
Attaches at:
- superior nuchal line
- nuchal ligament
- external occipital protuberance
AND
- clavicle
- acromion of scapula
Trapezius-Descending
(innervation)
Spinal Accessory Nerve (motor C1-C5)
AND
Anterior Rami of C3&C4
Trapezius-Descending
(action)
Elevates Scapula
(along with ascending-rotates scapula superiorly)
Levator scapulae
(Attachment)
Attaches to:
-transverse processes of cervical vertebrae
AND
medial border of scapula
Levator scapulae
(innervation)
Dorsal Scapular Nerve (C5)
AND
Anterior rami of C3 and C4
Levator scapulae
(action)
Elevates scapula
Rotates scapula inferiorly
Rhomboids
(attachments)
Both attach to the medial border of the scapula
AND
- the minor attaches to the spinous processes of C7 and T1
- the major attaches to the spinous processes of the upper thoracic vertebrae
Rhomboids
(innervation)
Dorsal Scapular nerve (C4-C5)
Rhomboids
(action)
Retract Scapula
Rotate Scapula Inferiorly
