lecture 3a: lateral cervical region, pectoral and scapular regions

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17 Terms

1
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innervates

  • supplies nerve impulses

2
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triangles of neck

  • anterior triangle (diff unit)

  • posterior triangle (aka lateral cervical)

    • contains:

      • occipital triangle

      • omnoclavicular triangle

<ul><li><p>anterior triangle (diff unit)</p></li><li><p>posterior triangle (aka lateral cervical)</p><ul><li><p>contains: </p><ul><li><p>occipital triangle</p></li><li><p>omnoclavicular triangle </p></li></ul></li></ul></li></ul><p></p>
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superficial cervical fascia

  • contains

    • platysma msucle

    • superficial veins

    • cutaneous nerves

4
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prevertebral fascia

  • muscles of the lateral triangle

  • extends: around anterior surface of the cervical vertebrae across the anterior midline

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lateral cervical region boundaries

  • anterior: posterior border of the sternocleidomastoid

  • posterior: anterior border of the trapezius

  • inferior: clavicle

  • roof:

    • skin

    • superficial layer of deep cercvical fascia

    • splits to enclose the trapezius/STC

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muscular floor of lateral cervical region

  • splenius capitis

  • levator scapulae

  • scalenus posterior (SP)

  • scalenus medius (SM)

  • scalenus anterior (SA)

  • omohyoid

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lateral cervical region nerves and vessels

  • lesser occipital (C2)

  • supraclavicular (C3,C4)

  • Accessory (CN XI)

  • occipital artery

  • transverse cervical artery

  • subclavan vein (crosses 1st rib)

  • subclavian artery (crosses 1st rib)

  • external jugular vein (EJV)

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deltopectoral (clavipectoral) triangle

borders:

  • deltoid

  • pectoralis major

  • middle 1/3 of clavicle

contents:

  • cephalic vein

  • deltopectoral lymph nodes

  • deltoid branch of thoracoacromial a.

<p>borders: </p><ul><li><p>deltoid</p></li><li><p>pectoralis major</p></li><li><p>middle 1/3 of clavicle</p></li></ul><p>contents:</p><ul><li><p>cephalic vein</p></li><li><p>deltopectoral lymph nodes</p></li><li><p>deltoid branch of thoracoacromial a. </p></li></ul><p></p>
9
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4 anterior axioappendicular muscles

  • attach the LE to the acial skeleton

    1. pec major

    2. pec minor

    3. subclavius

    4. serratus anterior

<ul><li><p>attach the LE to the acial skeleton</p><ol><li><p>pec major</p></li><li><p>pec minor</p></li><li><p>subclavius</p></li><li><p>serratus anterior</p></li></ol></li></ul><p></p>
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superficial posterior axioappendicular (extrinsic shoulder)

  • trapezius

  • lattisimus dorsi

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trapezius innervation

  • CN XI (spinal accessory nerve 11)

  • C3

  • C4

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deep posterior axioappendicular (extrinsic shoulder)

  • levator scapulae

  • rhomboid major

  • rhomboid minor

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levator scapulae innervation

  • dorsal scapular

  • C3

  • C4

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scapulohumeral muscles (intrinsic shoulder)

  • deltoids

  • teres major

  • rotator cuff

    • subscapularis

    • supraspinatus

    • infraspinatus

    • teres minor

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teres major innervation

  • lower subscapular nerve

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rotator cuff muscles

  • all originate on scapula

    • SSIT

      • subscapularis

      • supraspinatus

      • infraspinatus

      • teres minor

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