Chest and Back Flashcards
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.
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
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
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
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
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
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
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
Deltoid m
Intrinsic shoulder m O: lateral clavicle, scapular spine I: deltoid tuberosity (on humerus) Inn: axillary n Bs: deltoid branch of thoracoacromial trunk
Supraspiantus m
Intrinsic shoulder m O: supraspinatus fossa I: greater tubercle superior Inn: suprascapular n (C5, 6) Bs: suprascapular a
Infraspinatus m
Intrinsic shoulder m, O: Infraspinatus fossa I: middle greater tubercle Inn: suprascapular n (C5, 6) Bs: suprascapular a
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
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
Subscapularis m
Intrinsic shoulder m O: subscapular fossa I: lesser tubercle of humerus Inn: upper and lower subscapular nn (C5, 6) Bs: subscapular a
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
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
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
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
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
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
Muscles of the erector spinae
Spinalis, longissimus, iliocostalis mm
Muscles of the transversospinalis
Semispinalis, multifidus, rotatores mm