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Superficial Back
Superficial Back
10
Anatomy
Undergraduate 4
01/21/2009

Additional Anatomy Flashcards

 


 

Cards

Term
Upper Trapezius
Definition

origin: external occipital protuberance

medial 1/3 sup nuchal line

C2-C7 spinous processes (via ligamentum nuchae)

 

insertion: lateral 1/3 clavicle

 

action: neck extension, neck lateral flexion, neck rotation, scapular elevation (shrug), scapular retraction, scapular upward rotation

 

innervation: spinal accessory CN XI

C3 C4 (sensory)

Term
Middle Trapezius
Definition
origin: T1-T6 via ligamentum nuchae
 
insertion: medial margin of acromion, spine of scapula
 
action: scapular retraction
 
innervation: spinal accessory CN XI
C3 C4 sensory
Term
Lower trapezius
Definition
origin: T7-T12 spinous processes (via ligamentum nuchae)
 
insertion: medial border of scapular spine
 
action: scapular depression, scapular upward rotation, retraction
 
innervation: spinal accessory CN XI
C3 C4 sensory
Term
Latissimus Dorsi
Definition
origin: thoracolumbar fascia, spinous processes T6-L5, sacrum/iliac crest, lower 3-4 ribs
 
insertion: bicipital groove
 
action: shoulder extension, shoulder adduction, shoulder internal rotation
 
nerve: thoracodorsal
Term
Thoracodorsal nerve
Definition
- comes from posterial cord of brachial plexus
- usually damaged during surgical procedures (i.e. during breast cancer surgery)
- causes weakness to latissimus dorsia
Term
Rhomboid Major
Definition
origin: spinous processes T2-T5
 
insertion: medial border of scapula between scapular spine and inferior angle
 
action: scapular retraction, scapular elevation, scapular downward rotation
 
nerve: dorsal scapular
Term
Rhomboid Minor
Definition
origin: C7-T1 spinous processes
 
insertion: medial border of scapula at level of spine
 
action: scapular retraction, scapular elevation, scapular downward rotation
 
nerve: dorsal scapular
Term
Levator Scapulae
Definition
origin: C1-C4 transverse processes
 
insertion: superior angle and upper medial border of scapula
 
action: scapular elevation, scapular downward rotation, lateral neck flexion, neck extension (bilaterally)
 
nerve: dorsal scapular
Term
Triangle of Auscultation
Definition
Borders:
1. Latissimus Dorsi
2. Trapezius
3. Rhomboid Major
 
Enlarges when the arm is drawn across the body
 
Location for stethescope placement for respiratory sound examination (no muscle in the way)
Term
Lumbar Triangle
Definition
Borders:
1. Iliac crest
2. External oblique
3. Latissimus dorsi
 
On rare occassions, it is the sight of "lumbar hernia"
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