Origin / Insertion
Origin of Latissimus Dorsi
Iliac crest, SP all lumbar/sacral vert (via thoracolumar fascia), SP lower 6 thoracic vert, last 3-4 ribs, inf angle scap.
Action of Supinator
Supination
Innervation of the Pectoralis Muscle(s)
Pectoralis Major: Lateral and Medial Pectoral Nerve
Pectoralis Minor: Medial Pectoral Nerve
What action is lost with a long thoracic nerve injury?
Scapular Abduction.
_____ runs with the transverse cervical colli to innervate the _____.
CNXI: Spinal Accessory Nerve; Trapezius.
O/I: Serratus Anterior
O: ant surface of upper 8 ribs.
I: costal surface of med border of scap.
Action of Lower Trapezius
Scapular Depression and Upward Rotation.
Cord Segments of Long Thoracic Nerve
C5-C7.
What sensation is lost with an axillary nerve injury?
Sensation of the shoulder cap region.
What structures are found within the axillary sheath?
Axillary vein, nerve, and brachial plexus.
O/I: Anconeus
O: lat epicondyle of humerus.
I: olecranon, dorsal-lateral surface of ulna.
Action of Flexor Digitorum Superficialis
Wrist, 2-5 Digit MCP and PIP Flexion.
Innervation of Flexor Digitorum Profundus
Median Nerve: Digits 2, 3, and 1/2 of 4.
Ulnar Nerve: 1/2 of 4, and 5.
What is the clinical presentation of a patient with a radial nerve injury?
Wrist Drop!
The median nerve can be found traveling with the _____. This nerve innervates what group of muscles?
The brachial artery; forearm and thumb flexors.
Insertion of Opponens Pollicus
Radial side of first metacarpal of thumb.
Action of Lumbricals
Digits 2-5 MCP Flexion and IP Extension.
What muscle is innervated by the Superficial Branch of the Ulnar Nerve?
Palmaris Brevis
What action(s) are lost with a median nerve injury?
HINT: there are 3 main actions lost.
IP flexion of digits 1-4, pronation, thumb opp.
What two structures join the cephalic and basilic veins?
Median cubital vein and dorsal venous arch.
O/I: Dorsal Palmar Interossei
O: adjacent sides of MC.
I: digits 2-5 ext exp.
Action of Flexor Pollicus Brevis (Deep Head)
Thumb CMC and MCP Flexion; Assists with Opposition.
What Muscle(s) do the Median Nerve (and it's branches) Innervate?
HINT: there are 11 muscles.
Pronator Teres, FCR, Palmaris Longus, FDS, FDP, Flexor Pollicis Longus, Pronator Quadratus, Flexor Pollicis Brevis, Abductor Pollicis Breivis, Opponens Pollicis, Lumbricals.
What action(s) are lost with an Ulnar nerve injury?
HINT: there are 6 main actions lost.
IP flexion of digits 4-5, finger abd/add, thumb add, pinky opp/add.
The posterior interosseous nerve can be seen emerging from what structure, and branching into what muscles?
HINT: it branches into 6 muscles.
Emerging from the supinator, branching into extensor digitorum, extensor digiti minimi, abductor pollicus longus, extensor pollicus brevis, extensor pollicus longus, extensor indicis..