Muscles
Brachial Plexus
High Yield
Spine/Nerves
Muscle Action
100
What innervates the Biceps Brachii muscle?
Musculocutaneous nerve (C5,C6)
100
What nerve innervates the Supra and Infraspinatus muscles? AND what roots make up this nerve?
Suprascapular nerve (C5,C6)
100
What may a “winged Scapula” indicate?
- Damage to the Long Thoracic Nerve (or weakness to Serratus Ant.)
100
How many cervical nerves are there?
8
100
Extensor Indicis action
extend index finger @ MCJ, PIP and DIP
200
What are the muscles that compose the Erector Spinae muscle group?
1. Iliocostalis
2. Longissimus
3. Spinalis
200
What are the branches of the Lateral cord?
Median Nerve
Musculocutaneous nerve
200
A 10yr old fractures her humerus @ the surgical neck. What damage should you check for & how?
Axillary Nerve Damage
200
What provides sensory innervation to skin of the back
Dorsal Primary Rami
200
Action of Latissimus Dorsi Muscle?
extend, adducts and medially rotates Humerus
300
Name the rotator cuff muscles and their innervation
supraspinatus --> Suprascapular nerve (C5,C6)
Infraspinatus --> Suprascapular nerve (C5,C6)
Teres Minor --> Axillary nerve (C5,C6,)
Subscapularis --> upper and lower subscapular nerves (C5,C6)
300
What area does the Axillary nerve supply sensation to?
the superior lateral cutaneous nerve branch to sensory over posterior deltoid
300
What innervates the intrinsic muscles of the hand?
ulnar nerve
300
Define a spinal nerve?
mixed fibers from dorsal and ventral root
300
The action of Subscapularis Muscle
Medial rotation of the arm
400
What 3 things attach to the coracoid process?
The short head of the biceps
coracobrachialis
Pectoralis minor
400
If a person lost motor capability of the intrinsic hand muscles, as well as palmar sensory capacity in 5th digit and ulnar half of 4th digit, where is the ulnar nerve damaged?
After Guoyans’ Canal
400
What are the borders and contents of the Quadrangular space?
Borders:
- Long head of the triceps
-Teres minor
-Teres Major
-Humerus
Contents:
- Axillary nerve
-Posterior Humeral Circumflex
400
What vertebral level can you find the conus medularis
L1-L2
400
Action of Anconeus muscle
extends forearm and stabilizes elbow joint
500
Name the superficial and deep layers of the forearm muscles
Superficial:
1. Pronator teres
2. Flexor Carpi Radialis
3. Palmaris longus
4. Flexor digitorium superficialis
5. Flexor carpi ulnaris
Deep
1. flexor digitorum profundus
2. flexor pollicis lingus
3. pronator quadratus
500
Draw out the the brachial plexus including all of the roots, trunks,divisions, cords, and branches :)
500
What are the borders and contents of the triangular interval
Borders:
- teres major
-Long head of the triceps brachii
-Humerus
Contents:
-Radial nerve
-Deep branchial artery
500
If a Dorsal root was severed what would a patient present like?
dermatome sensory loss
500
Action of Flexor digitorium superficialis?
flex MCP and PIP (wave bye-bye)