Term
| Deep Intrinsic Back Muscles |
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Definition
Erector Spinae (spinalis, longissimus, iliocostalis)
Transversospinalis (multifidus, semispinalis, rotatores)
interspinal intertraverse (interspinales, intertransversarii)
dorsal rami |
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Term
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Definition
deep intrinsic back muscle - erector spinae - medial; spinous process below to spinous process above
trunk extension, lateral flexion |
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Term
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Definition
deep intrinsic - erector spinae - middle; longest skeletal muscle
from ileum to transverse processes and ribs
extension, lateral flexion |
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Term
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Definition
from sacrum and ileum and insert onto ribs
deep intrinsic back muscle - erector spinae - lateral
extension, lateral flexion |
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Term
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Definition
most superficial
bilateral trunk extension
unilateral, lateral flexion |
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Term
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Definition
deeper than erector spinae
between transverse and spinous processes
multifidus, semispinalis, rotatores
extension and unilateral rotate to opposite side |
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Term
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Definition
deep intrinsic back muscle -transversospinalis
most superficial
from sacrum upward to spinal processes |
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Term
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Definition
well developed at base of skull
deep intrinsic back muscle - transversospinalis - middle |
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Term
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Definition
deepest transversospinalis muscle - deep intrinsic back muscle
only span a level or two |
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Term
| intermediate extrinsic back muscles |
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Definition
serratus posterior superior, serratus posterior inferior, levator costae
rhomboid major and minor
ventral rami from hypaxial myotomes |
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Term
| serratus posterior superior |
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Definition
intermediate extrinsic back muscle
accessory respiratory muscle
intercostal nerves
deep to rhomboids |
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Term
| serratus posterior inferior |
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Definition
intermediate extrinsic back muscle
accessory respiratory muscles
intercostal nerves |
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Term
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Definition
intermediate extrinsic back muscle
accessory respiratory muscle
intercostal nerves |
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Term
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Definition
intermediate extrinsic back muscle
upper limb muscle
dorsal scapular nerve
C5
superficial to serratus posterior
spinous processes of lower neck and upper thorax to vertebral border of the scapula
major lies inferior to minor |
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Term
| superficial extrinsic back muscles |
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Definition
ventral rami or accessory nerve
trapezius and latissimus dorsi |
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Term
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Definition
superficial extrinsic back muscle
upper limb and neck muscle
accessory nerve (CN11)
originates from skull and nuchal ligament and spinous processes
attaches to clavicle and scapula |
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Term
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Definition
upper limb muscle
long thoracic nerve (C5-7)
superficial extrinsic back muscle
originates from thoracolumbar fascia and inserts on humerus |
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Term
| Extrinsic shoulder muscles |
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Definition
superficial: trap, lat dorsi
deep: rhomboids, levator scapulae |
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Term
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Definition
rotator cuff: supraspinatus, subscapularis, infraspinatus, teres minor
deltoid, teres major |
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Term
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Definition
intrinsic - rc
• O: supraspinus fossa
• I: greater tubercle
• A: shoulder abduction
• N: suprascapular nerve
• Passes superior to joint |
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Term
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Definition
intrinsic, rc
• O: infraspinus fossa
• I: posterior greater tubercle
• A: external rotation
• N: suprascapular nerve
• Posterior to joint |
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Term
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Definition
intrinsic rc
• O: subscapular fossa
• I: lesser tubercle
• A: internal rotation
• N: upper subscapular and lower subscapular nerves |
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Term
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Definition
intrinsic, rc
• O: axillary border of scapula
• I: lower greater tubercle
• A: external rotation
• N: axillary nerve |
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Term
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Definition
intrinsic
• O:
• Anterior – lateral clavicle
• Middle – acromion process
• Posterior – spinus process
• I: deltoid tuberosity
• A:
• Anterior – shoulder flexion
• Lateral – abduction
• Posterior – extension
• N: axillary nerve |
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Term
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Definition
intrinsic
• O: inferior scapula
• I: intertubercular sulcus
• A: adductior, medial rotation, extension
• N: lower subscapular nerve |
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Term
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Definition
• O: medial clavicle, sternocostal head
• I: intertubercular sulcus
• A: horizontal flexion
• Clavicular head – flexion
• Sternocostal head – extension from flexed position
• N: lateral and medial pectoral nerves |
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Term
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Definition
• O: ribs 3-5
• I: coracoid process of scapula
• A: depression of scapula, deeper breathing
• N: medial pectoral nerve |
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Term
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Definition
o Ribs 1-8
o I: vertebral border of scapula
o A: protraction of scapula; rotation of scapula upward
o N: long thoracic nerve |
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Term
| anterior compartment of arm |
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Definition
flexion, musculocutaneous nerve
biceps brachii, brachialis, coracobracialis |
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Term
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Definition
o Biceps Brachii
• O:
• Short head: coracoid process of scapula
• Long head: supraglenoid tuberosity
• I: radial tuberosity
• Bicipital aponeurosis blends with deep fascia of forearm
• A: flexes forearm, shoulder flexion, supination
o Brachialis (deep to biceps)
N: musculocutaneous nerve |
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Term
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Definition
deep to biceps
• O: anterior midshaft of humerus
• I: ulna tuberosity/coranoid process
• A: most powerful elbow flexor
N: musculocutaneous nerve |
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Term
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Definition
• O: coracoid process
• I: medial midshaft humerus
• A: flexion of shoulder; adduction of shoulder; resists downward dislocation
N: musculocutaneous n |
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Term
| posterior compartment of arm |
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Definition
extension radial nerve
triceps brachii, anconeus |
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Term
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Definition
• O:
• Long head: infraglenoid process of scapula
• Lateral head: above radial groove
• Medial head: below radial groove
• I: olecranon process
• A: extension of elbow; long head: arm extension
N: radial |
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Term
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Definition
• O: lateral epicondyle
• I: posterior superior ulna
• A: extension of elbow
N: radial |
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Term
| trunk muscles across scapulothoracic joint |
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Definition
| trap, rhomboids, leavtor scapulae, serratus anterior, pectoralis minor, subclavius |
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Term
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Definition
| supraspinatus, lateral deltoid, upper subscapularis |
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Term
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Definition
| biceps brachii, ant deltoid, pec major (clavicular head), coracobrachialis |
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Term
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Definition
| lat dorsi, post deltoid, pec major (sternocostal head), triceps brachii (long head), teres major |
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Term
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Definition
| teres major, lat dorsi, pec major, coracobrachialis, teres minor |
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