Chest and Back Flashcards by Lauren Parr

Rhomboid major and minor mm

Superficial back mm.
O: nuchal ligament, C7-T5 transverse processes
I: medial border of scapula
Inn: dorsal scapular n.
BS: dorsal scapular a.

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Pectoralis major m

Superficial chest m
O: sternum, ribs, clavicle
I: lateral aspect of inter tubercular groove
Inn: lateral and medial pectoral nn.
BS: pectoral branch of thoracoacromial trunk

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Pectoralis minor m

Chest muscle deep to pec major m.
O: ribs 3-5
I: coracoid process
Inn: medial pectoral n
Bs: pectoral branch of thoracoacromial trunk

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Serratus anterior m

Superficial inferior (lateral) chest muscle
O: ribs 1-8, 9, lateral wall of thorax
I: anterior medial border of scapula
Inn: long thoracic n (C5, 6, 7)
Bs: lateral thoracic a

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Subclavius m

Superior chest m
O: rib 1 sternal end
I: inferior middle half of clavicle
Inn: n to subclavius (C5, 6 ventral ramus)
Bs: clavicle branch of thoracoacromial trunk

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Trapezius m

Superficial extrinsic back m
O: superior nuchal line external occipital protuberance, spinous processes of C7-T12
I: lateral middle of clavicle, acromion, scapular spine
Inn: CN XI (spinal accessory n.)
Bs: transverse cervical a

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Levator scapulae m

Superficial superior back m
O: C1-C4 transverse processes
I: superior medial border of scapula
Inn: dorsal scapular n (ventral C3, 4, 5)
Bs: dorsal scapular a

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Latissimus Dorsi m

Superficial back m
O: T7-T12 spinous processes, iliac crest, inferior ribs 3, 4
I: floor of interubercular groove
Inn: thoracodorsal dorsal n (C6-8)
Bs: thoracodorsal a

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Deltoid m

Intrinsic shoulder m
O: lateral clavicle, scapular spine
I: deltoid tuberosity (on humerus)
Inn: axillary n
Bs: deltoid branch of thoracoacromial trunk

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Supraspiantus m

Intrinsic shoulder m
O: supraspinatus fossa
I: greater tubercle superior
Inn: suprascapular n (C5, 6)
Bs: suprascapular a

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Infraspinatus m

Intrinsic shoulder m, 
O: Infraspinatus fossa
I: middle greater tubercle 
Inn: suprascapular n (C5, 6)
Bs:  suprascapular a

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Teres minor m

Shoulder m
O: superior lateral border of scapula
I: inferior greater tubercle
Inn: axillary n (C5, 6)
Bs: subscapular and scapular circumflex AA

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Teres major m

Intrinsic shoulder m
O: posterior inferior angle of scapula
I: medial aspect of intertubercular groove
Inn: lower subscapular n (C5, 6)
Bs: subscapular and scapular circumflex AA

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Subscapularis m

Intrinsic shoulder m
O: subscapular fossa
I: lesser tubercle of humerus
Inn: upper and lower subscapular nn (C5, 6)
Bs: subscapular a

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Serratus posterior superior m

Intermediate intrinsic back m
O: ligamentum nuchae and C7-T3 spinous processes 
I: upper border of ribs 2-5
Inn: segmental intercostal nn #1-4
Bs: segmental intercostal aa

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Serratus posterior inferior m

Intermediate extrinsic back m
O: T11-L2 spinous processes 
I: lower border of ribs 9-12
Inn: last 4 segmental intercostal nn
Bs: segmental intercostal aa

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Splenius capitus m

Superficial intrinsic upper back m
O: ligamentum nuchae and T1-6 spinous processes
I: Lateral mastoid process and supior nuchal line
Inn: segmental dorsal rami of upper cervical nn
Bs: segmental intercostal aa

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Splenius cervicis m

Superficial extrinsic back m
O: T3-6 spinous processes
I: C1-3 transverse processes 
Inn: segmental dorsal rami of lower cervical nn
Bs: segmental intercostal aa

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Iliocostalis lumborum m

Intermediate intrinsic back m, part of erector spinae
O: T11-L5 spinous processes, iliac crest, sacrum
I: lower border of ribs 7-12 at angle
Inn: segmental dorsal rami
Bs: segmental intercostal aa

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Iliocostais thoracis m

Intermediate intrinsic back m, part of erector spinae
O: upper border of ribs 7-12,  at angle
I: ribs 1-6, lower border at angle
Inn: segmental dorsal rami
Bs: segmental intercostal aa

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Muscles of the erector spinae

Spinalis, longissimus, iliocostalis mm

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Muscles of the transversospinalis

Semispinalis, multifidus, rotatores mm

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Longissimus m

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Intermediate intrinsic back m, part of erector spinae
O: spinous/transverse processes of thoracic/cervical vertebrae
I: ribs 9, 10; transverse spinal processes C2-6,mastoid process
Inn: segmental dorsal rami
Bs: segmental intercostal aa

Spinalis m

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Intermediate intrinsic back m,  part of erector spinae
O: T1-12 transverse processes
I: ???
Inn: segmental dorsal rami
Bs: segmental intercostal aa

Semispinalis capitus m

``` Deep intrinsic back m, of neck O: C3-T6 transverse processes I: midline to mastoid process btwn superior and inferior nuchal lines Inn: segmental dorsal rami Bs: segmental intercostal aa ```

Rectus capitus posterior major m

Deep intrinsic back m, suboccipital, of neck O: C2 spinous process I: lateral inferior nuchal line and occipital bone Inn: suboccipital n (C1) dorsal ramus Bs: vertebral and occipital aa

Rectus capitus posterior minor m

``` Deep intrinsic, suboccipital back m O: C1 posterior tubercle I: medial inferior nuchal line Inn: suboccipital n (C1) dorsal ramusm Bs: vertebral and occipital aa ```

Superior obliquus capitus m

``` Deep intrinsic, suboccipital back m O: C1 transverse process I: occipital bone btwn superior and inferior nuchal lines Inn: suboccipital n (C1) dorsal ramus Bs: vertebral and occipital aa ```

Inferior obliquus capitus m

``` Deep intrinsic , suboccipital back m O: C2 spinous process I: C1 transverse process Inn: suboccipital n (C1) dorsal ramus Bs: vertebral and occipital aa ```

Branches of the thoracoacromial a

Clavicular, pectoral, deltoid, acromial branches

Clavicular branch of the thoracoacromial a supplies which m?

Subclavius m

Pectoral branch of the thoracoacromial a supplies which mm?

Pectoralis minor and Pectoralis major mm

Deltoid branch of the thoracoacromial a supplies which m?

Deltoid m

Cephalic vein runs where?

Runs through the deltopectoral groove (btwn pec major and deltoid mm) and dives under the clavicle at the deltopectoral triangle

Subcutaneous components of the breast are ?

Mammary glands and fat = majority, Deep to surface: Glands -- lactiferous ducts -- lactiferous sinuous -- (lactiferous ducts again) -- nipple

Lymphatic drainage of the breasts goes to?

Mostly to axillary lymph nodes (in armpits)

Blood supply to breasts is by ?

Internal and lateral thoracic aa

3 layers of epithelial are ?

(superficial to deep): 1. True epithelial 2. Mesothelia 3. Endothelia

Clavicle bone

Art: maunbrium (sternum), acromion (scapula) Holds scapula away from thorax

Scapula bone

Art: clavicle, humerus Triangular, has... Scapular spine, acromion, coracoid process, glenoid fossa

Humerus bone

Art: scapula (glenoid fossa), ulna/radius Contains... Head, anatomical neck, greater and lesser tubercles, intertubercular groove, deltoid tuberocity

Subclavian artery becomes what after passes 1st rib?

Subclavian a -- axillary a -- brachial a -- radial and ulnar aa

Branches of the axillary a?

1. Superior thoracic 2. a) thoracoacromial trunk b) lateral thoracic a 3. a) subscapular trunk b) posterior humeral circumplex c) anterior humeral circumflex

Arterial branches of the subscapular trunk

1. Circumflex scapular a | 2. Thoracodorsal a

Dorsal root carries what type of neural info?

Dorsal - sensory *has cell body (root ganglion) close to spinal cord ("IN the Back")

Ventral root carries which type of neural info?

Ventral - motor *has cell body out nearer the mm ("IN the Front")

5 segment types of the brachial plexus?

(medial to lateral) 1. Root 2. Trunk 3. Divisions 4. Cords 5. Branches

Triangle of auscultation is where?

Triangle with minimal muscle cover, good space for listening to breathing Mm: Trapezius, latissimus dorsi, rhomboid major

M responsible for first 15 degrees of arm rotation

Supraspinatus m

M responsible for most of arm rotation (degrees 15-90)

Deltoid m

Sternoclavicular joint is where?

Synovial Shoulder joint, articulates with clavicle and maunbrium Attaches the interclavicular and costoclavicular ligaments too!

Acromioclavicular joint - where, what f(x)?

Art: clavicle and acromion of scapula | Synovial shoulder joint, often dislocated in accidents/injuries

Glenohumeral joint - where?

Art: head of humerus, glenoid cavity of scapula

Triangular space - borders, contents

Window to see circumflex scapular a Superior: Teres minor Inferior: Teres major Lateral: triceps long head

Triangular interval - borders, contents

See radial nerve and deep brachial artery here Sup: Teres major Lat: triceps lateral head Medial: triceps long head

Quadrangle space

Where axillary n and posterior humeral circumflex a pass through Sup/inf: Teres minor/major Med: triceps long head Lat: humerus (and triceps lateral head)

good location for epidural injection

sacral hiatus, bc = opening in bone, = cauda equina (Not spinal cord anymore)

Chest and Back Flashcards

(57 cards)