Anatomy Midterm Flashcards
Serratus posterior superior & inferior origin, insertion, action, innervation
SPS: spinous processes of C7-T2 // ribs
SPI: Spinous processes of T11-L2 // ribs
action: role in respiration & proprioception
Innervation: intercostal n., anterior rami
Splenius origin, insertion, action, innervation
O: spinous processes of C3-T6
I: Splenius capitus: mastoid process
Splenius cervicis: transverse processes of C1-C3
A: lateral flexion of neck, rotate head, extend head & neck
Innervation: posterior rami of spinal n.
Erector spinae group (illiocostalis, longissimus, spinalis) origin, insertion, action, innervation
O: SP of lumbar vertebrae, sacrum, iliac crest
I: illiocostalis - ribs
longissimus - TP
spinalis - SP
A: extend & lateral flexion of vertebral column
Innervation: posterior rami of spinal nerves
Transversospinal group (semispinalis, multifidus, rotatores) origin, insertion, action, innervation
O: TP
I: SP
A: extend, rotate, stabilze vertebral column
Innervation: posterior rami of spinal n.
Segemental group (interspinalis, intertransversarii*, levator costarum) action, innervation
A: extend, lateral flex, rotate vertebral column, elevate ribs in respiration
Innvervation: posterior rami of spinal n.
*anterior rami of spinal n.
Trapezius origin, insertion, action, innervation
O: base of skull, nuchal ligament, SP C7-T12
I: Lateral 1/3 of clavicle, acromion, spine of scapular
A: elevate, retract, depress scapula
Innervation: spinal accessory n.
Latissimus dorsi origin, insertion, action, innervation
O: SP of lower thoracic vertebrae, thoracolumbar fascia, illiac crest
I: floor of intertubercular groove of humerus
A: extend, adduct, medially rotate humerus
Innervation: thoracodorsal n.
Rhomboid major & minor origin, insertion, action, innervation
O: minor - SP C7 & T1
major - SP T2-T5
I: minor - medial border of scapula (at level of spine of scapula)
major - medial border of scapula (at level below spine of scapula)
A: Retract, rotate scapula
Innervation: dorsal scapular n.
Levator Scapulae origin, insertion, action, innervation
O: TP C1-C4
I: Medial border of scapula (at level above spine of scapula)
A: elevate, rotate scapular
Innervation: dorsal scapula n.
What is 4 2 2 4?
4 - Levator Scapulae TP C1-C4
2 - Skip 2
2 - Rhomboid minor SP C7-T1
4 - Romboid major SP T2-T5
SITS muscles
supraspinatus, infraspinatus, teres minor, subscapularis
Supraspinatous origin, insertion, action, innervation
O: Supraspinous fossa of scapula
I: greater tubercle of humerus - superior facet
A: Abducts humerus
Innervation: suprascapular n.
Infraspinatous origin, insertion, action, innervation
O: Infraspinous fossa of scapula
I: greater tubercle of humerus - middle facet
A: lateral rotation of humerus
Innervation: suprascapular n.
Teres minor origin, insertion, action, innervation
O: lateral border of scapula
I: greater tubercle of humerus - inferior facet
A: Lateral rotation of humerus
Innervation: Axillary n.
Subscapularis origin, insertion, action, innervation
O: Subscapular fossa of scapula
I: lesser tubercle of humerus
A: Medial rotation of humerus
Innervation: upper & lower subscapular n.
Deltoid origin, insertion, action, innervation
O: Lateral 1/3 of clavicle, acromion, spine of scapula
I: deltoid tuberosity of humerus
A: anterior - flex & medial rotation of humerus
middle - abduct humerus
posterior - extend & lateral rotation of humerus
Innervation: axillary n.
Teres major origin, insertion, action, innervation
O: lateral border of scapula - inferior aspect
I: intertubercular groove of humerus - medial lip
A: adduction & medial rotation of humerus
Innervation: lower subscapular n.
Bones of the pectoral girdle
clavicle, acromion, spine of scapula, suprascapular notch, coracoid process of scapula
Important landmarks on humerus
intertubercular groove, greated & lesser tubercle (3 facets: superior, middle, inferior), deltoid tuberosity
Pectoralis major origin, insertion, action, innervation
O: medial half of clavicle, manubrium, sternum
I: intertubercular groove of humerus - lateral lip
A: flexion, adduction, and internal rotation of the humerus
Innervation: medial & lateral pectoral n.
Pectoralis minor origin, insertion, action, innervation
O: ribs 3-5
I: coracoid process
A: stabilization, depression, abduction or protraction, internal rotation and downward rotation of the scapula
Innervation: medial pectoral n.
Serratus Anterior origin, insertion, action, innervation
O: ribs 1-8
I: anterior aspect of medial border of scapula
A: protraction & rotation of scapula
Innervation: long thoracic n.
Subclavius origin, insertion, action, innervation
O: rib 1
I: clavicle - inferior aspect
A: Anchors and depresses clavicle, stabilizes clavicle, resists tendency of clavicle to dislocate @ sternoclavicular joint
Innervation: n. to subclavius
Muscles that attach at intertubercular groove of humerus
Pec major, lats, teres major (Think “PLT”)
