Lab 8 - DEEP ANATOMY OF THE SHOULDER AND UPPER LIMB Flashcards
Name this muscle, then name the following:
- Origin
- Insertion
- Action(s)/function(s)
- Innervation
Subscapularis (anterior view)
- Origin: subscapular fossa (most anterior surface of scapula)
- Lesser tubercle of humerus
- Movements: medial rotation and adduction of shoulder joint
- Function: Helps hold humeral head in the glenoid cavity
- Innervation: Upper and lower subscapular nerves (C5, C6, C7)
Name this muscle, then name the following:
- Origin
- Insertion
- Action(s)/function(s)
- Innervation
Terres minor (posterior view)
- Origin: middle part of lateral border of scapula
- Insertion: inferior facet of the greater tubercle of the humerus
- Movements: lateral rotation of shoulder joint
- Function: helps hold humeral head in the glenoid cavity of the scapula
- Innervation: Axillary nerve (C5, C6)
Name this muscle, then name the following:
- Origin
- Insertion
- Action(s)/function(s)
- Innervation
Supraspinatus (posterior view)
- Origin: supraspinous fossa of scapula
- Insertion: Superior facet of greater tubercle of humerus
- Function:
◘ Initiates & assists deltoid in abduction of shoulder joint
◘ Acts with the other 3 rotator cuff muscles.
- Innervation: Suprascapular nerve (C4, C5, C6)
Name this muscle, then name the following:
- Origin
- Insertion
- Action(s)/function(s)
- Innervation
Infraspinatus (posterior view)
- Origin: Infraspinous fossa of scapula
- Insertion: Middle facet of greater tubercle of humerus
- Movements: lateral rotation of shoulder joint
- Function: helps hold humeral head in the glenoid cavity of the scapula
- Innervation: Suprascapular nerve (C5, C6)
Name this muscle, then name the following:
- Origin
- Insertion
- Action(s)/function(s)
- Innervation
Levator scapulae (posterior view)
- Origin: posterior tubercles of transverse processes of C1-C4 vertebrae
- Insertion: Medial border of scapula superior to root of spine
- Actions:
◘Elevation of scapula
◘Rotation of glenoid cavity inferiorly
- Innervation: Dorsal scapular (C5) and cervical (C3, C4) spinal nerves
Name this muscle, then name the following:
- Origin
- Insertion
- Action(s)/function(s)
- Innervation
Rhomboid major
- Origin: spinous processes of T2-T5 vertebrae
- Insertion: Medial border of scapula from level of spine to inferior angle
- Actions:
◘ Retraction of scapula
◘ Rotation of glenoid cavity inferiorly
◘ Fixes the scapula to the thoracic wall
- Dorsal scapular nerve (C4, C5)
Name this muscle, then name the following:
- Origin
- Insertion
- Action(s)/function(s)
- Innervation
Rhomboid minor
- Origin:
◘Nuchal ligament
◘Spinous processes of C7 AND T1 vertebrae
- Insertion: triangular area at medial end of scapular spine
- Actions:
◘ Retraction of scapula
◘ Rotation of glenoid cavity inferiorly
◘Fixes the scapula to the thoracic wall
Innervation: dorsal scapular nerve (C4, C5)
Name this muscle, then name the following:
- Origin
- Insertion
- Action(s)/function(s)
- Innervation
Teres major
- Origin: inferior part of lateral border of scapula and posterior surface of inferior angle of scapula
- Insertion: medial lip of intertubercular sulcus of humerus
- Actions: adduction and medial rotation of shoulder joint
- Innervation: lower subscapular nerve (C5, C6)
Name this muscle, then name the following:
- Origin
- Insertion
- Action(s)/function(s)
- Innervation
Subclavius
- Origin: junction of 1st rib and its costal cartilage
- Insertion: inferior surface of middle third of clavicle
- Action: anchors & depresses the clavicle
- Innervation: subclavian nerve (C5, C6)
Name this muscle, then name the following:
- Origin
- Insertion
- Action(s)/function(s)
- Innervation
Pectoralis minor
- Origin: 3rd-5th ribs near their costal cartilages
- Insertion: Medial border and superior surface of coracoid process of scapula
- Function: stabilizes scapula by drawing it inferiorly and anteriorly against the thoracic wall
- Innervation: Medial pectoral nerve (C8, T1)
Name this muscle, then name the following:
- Origin
- Insertion
- Action(s)/function(s)
- Innervation
Serratus anterior
- Origin: external surfaces of lateral parts of 1st-8th ribs
- Insertion: anterior surface of medial border of scapula
- Actions:
◘ Protracts scapula and holds it against thoracic wall
◘ Rotates scapula
- Innervation: long thoracic nerve (C5, C6, C7)
Name this muscle, then name the following:
- Origin
- Insertion
- Action(s)/function(s)
- Innervation
Brachialis
- Origin: distal half of anterior surface of humerus
- Insertion:
◘Coronoid process of ulna
◘tuberosity of ulna
- Action: flexion of elbow joint in all positions
- Innervation: musculocutaneous nerve (C5, C6)
Name this muscle, then name the following:
- Origin
- Insertion
- Action(s)/function(s)
- Innervation
Coracobrachialis
- Origin: tip of coracoid process of scapula
- Insertion: middle third of medial surface of humerus
- Functions:
◘ Aids in flexion and adduction of shoulder joint
◘ Resists dislocation of shoulder
Name this muscle, then name the following:
-Compartment it belongs to
- Origin
- Insertion
- Action(s)/function(s)
- Innervation
Flexor digitorum profundus (FDP)
- Anterior compartment (deep - 3rd - layer)
- Origin: proximal three quarters of medial and anterior surfaces of ulna and interosseous membrane.
- Insertion: bases of distal phalanges of 2nd, 3rd, 4th, and 5th digits
- Action:
◘ Flexion of wrist joint
◘ Flexion of carpometacarpal joints
◘ flexion of distal interphalangeal joints of digits 2-5
◘ Assists with wrist flexion
ERIKA - GO BACK ADD INNERVATION
Name this muscle, then name the following:
-Compartment it belongs to
- Origin
- Insertion
- Action(s)/function(s)
- Innervation
Flexor pollicis longus
- Anterior compartment (deep - 3rd - layer)
- Origin: anterior surface of radius and adjacent interosseous membrane
- Insertion: base of distal phalanx of thumb
- Actions:
◘ Flexion of wrist joint
◘Flexion of carpometacarpal joints
◘ Flexion of the metacarpophalangeal and interphalangeal joints of the thub
- ERIKA - GO BACK AND ADD INNERVATION
Name this muscle, then name the following:
-Compartment it belongs to
- Origin
- Insertion
- Action(s)/function(s)
- Innervation
Pronator quadratus
- anterior compartment
- origin: distal quarter of anterior surface of ulna
- insertion: distal quarter of anterior surface of radius
- action: pronation of forearm
- function: deep fibers bind radius and ulna together.
- Innervation: ERIKA GO BACK AND ADD THIS
