Term
| What are the anatomical classifications of the back muscles? |
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Definition
Superficial
Intermediate
Deep |
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Term
| What are the functional classiciations of back muscles ? |
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Definition
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Term
| Name the function of and individual extrinsic back muscles. |
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Definition
superficial muscles control appendicular skeleton
- trapezius
-latissimus dorsii
-rhomboid major/minor
-levator scapulae
intermediate muscles assist in respiration
-posterior serratus superior
-posterior serratus inferior |
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Term
| What is the classification, origin, and attachment of trapezius M? |
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Definition
superficial extrinsic muscle
Attaches at nuchal ligament and occipital protuberance through spinal proceses of C7-T12
Inserts at lateral 1/3 of clavicle, acromion, and spine of scapula |
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Term
| What is the innervation of the trapezius M? |
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Definition
CN XI - Accessory Nerve
C4-C5 for proprioception |
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Term
| what is action of trapezius M? |
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Definition
elevates, rotates, retrats, scapula
inferior fibers depress scapula |
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Term
| What is the classification and action of the latissimus dorsii? |
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Definition
superficial extrinsic back muscle
extends, abducts, and medially rotates humerous |
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Term
| what is the origin and insertion of the lattissimus dorsii? |
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Definition
orginiates at the spinous processes of T7-T12, thoracolumbar fascia, and iliac crest
inserts on intertuburcular process of humerous |
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Term
| what is the innervation of latissimus dorsii? |
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Definition
| C6-C8 thoracodorsal nerve |
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Term
| what is the classication and action of the levator scapulae |
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Definition
superficial extrinisic back muscles
elevates medial portion of scapula to tilt glenoid cavity inferiorly |
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Term
| what are the origins and insertions of levator scapulae? |
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Definition
originates at transverse processes of C3-C4
inserts at the medial border of scapula |
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Term
| what is the inervation of levator scapulae? |
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Definition
C3-C4
C5 dorsal scapular nerve |
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Term
What is the classification and action of the rhomboid Ms?
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Definition
rhomboid major and minor and superficial extrinsic back muscles
they retract the scapula and depress it against thoracic wall, depress glenoid cavity |
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Term
| what are the orgins and insertions of rhomboid major and minor |
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Definition
Minor attachment: nuchal ligament and spinous processes of C7-T1
Major attachment: spinous process of T2-T5
Insertion: Medial border of scapula |
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Term
| what is the innervation of the rhomboid major and minor Ms? |
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Definition
| C4 - C5 dorsal scapular nerve |
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Term
| what is the classification and action of the serratus superior and inferior? |
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Definition
the serratus superior and inferior and intermediate extrinsic back muscles
the superior elevates the rib cage while the inferior depresses it |
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Term
| what are the origins and insertions of the superior serratus M? |
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Definition
Originates at the nuchal ligament and the spinous processes of C7-T3
Inserts on the superior aspects of ribs 2-4 |
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Term
| what are the origins and insertions of the inferior serratus? |
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Definition
the inferior serratus orginates at the spinous processes of T11-L2
inserts on superios aspects of ribs 9-12 |
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Term
| what are the innervations of the superior and inferior serratus M? |
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Definition
superior T1-T4
inferior T9-T12 |
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