Nerves and Vessels UL Flashcards
Name the 5 segments of the brachial plexus, proximal to distal
- Roots (anterior rami C5 to T1)
- Trunks
- Divisions
- Cords
- Terminal Branches
Name the 3 trunks of the brachial plexus, and list the roots that communicate with each
Superior Trunk: C5/C6
Middle Trunk: C7
Inferior Trunk: C8/T1
Each of the 3 trunks branch distally into two ____:
____ and ____.
Divisions: Posterior and Anterior
Name the 3 cords, and list their contributors
Posterior Cord: 3 Posterior divisions
Lateral Cord: Anterior divisions of the Superior and Middle Trunks
Medial Cord: Anterior division of the Inferior Trunk
What are the terminal branches of the Posterior Cord?
Axillary n., Radial n.
What terminal branch is formed by portions of the Lateral and Medial Cords?
Lateral Cord: Musculocutaneous n.
Parts of both: Median n.
Medial Cord: Ulnar n.
Axillary n.
(Motor, Cutaneous, Anatomy)
Motor
Deltoid, Teres Major
Cutaneous
superficial to deltoid
Anatomy
surgical neck of humerus
Radial n.
(Motor, Cutaneous, Anatomy)
Motor
Triceps, all posterior forearm
Cutaneous
Posterior arm, posterior forearm, lateral 3.5 digits (excpt. dorsal tips)
Anatomy
between lateral and medial head of triceps
Musculocutaneous n.
(Motor, Cutaneous, Anatomy)
Motor
all anterior arm
Cutaneous
lateral forearm
Anatomy
pierces coracobrachialis m., deep to bicps br.
Median n.
(Motor, Cutaneous, Anatomy)
Motor
anterior forearm mm. (except Flx Carpi Uln. & medial 1/2 of Flx Digi Prof.), Thenars, lateral 2 Lumbricals
Cutaneous
2/3 of palm plus 3.5 dorsal tips
Anatomy
cubital fossa, carpal tunnel
Ulnar n. (Motor, Cutaneous, Anatomy)
Motor
Flexor Carpi Ulnaris, medial 1/2 of Flexor Digitorum Profundus
Cutaneous
medial 1.5 digits
Anatomy“funny” bone, posteriorly to medial epicondyle, superficial to carpal tunnel
Possible symptoms of damage to Radial n.
Decreased extension ability at elbow, wrist (“wrist drop”), and thumb
Possible symptoms of damage to Axillary n.
Decreased abduction ability at shoulder, overall shoulder weakness
Possible symptoms of damage to Musculocutaneous n.
Loss of function in biceps br. m. and brachialis m., affecting flexion and supination at the elbow
Possible symptoms of damage to Median n.
Deficit in hand grip and/or thumb opposition
Fracture in surgical neck of humerus: what nerve could be damaged, and how would you check?
Axillary n.
Check cutaneous sensation superficial to deltoid
Fracture in midldle shaft of humerus: what nerve could be damaged, and how would you check?
Median n. or Ulnar n.
Check cutaneous sensation on medial and lateral dorsal hand; check movement of fingers and wrist
From where does the Right Subclavian a. branch?
Brachiocephalic Trunk (< aortic arch)
What is the path of each Subclavian artery?
Under the clavicle to Rib 1.
Beyond Rib 1 it is called the Axillary a.
What is the path of the Axillary a.?
From Rib 1 (Subclavian a.) to Teres Major m.
Beyond Teres Major m. it is called the Brahial a.
What are the borders and contents of the Cubital Fossa?
Borders
Brachioradialis m. and Pronator Teres
Contents
Biceps brachii tendon, Brachial a., Median n.
(TAN, lateral to medial)
Brachial artery branches where and into what?
Inferior to Cubital Fossa: Radial a., Ulnar a.
In what layer of the upper limb do the superficial veins run?
Hypodermal, outside the deep fascia
Name the deep vein pairs of the upper limb
Radial vv., Ulnar vv., Brachial vv.
Name the superficial veins of the upper limb
Basilar v. (medial), Cephalic v. (lateral), Median Cubital v.
What are the borders and contents of the Carpal Tunnel?
Borders
Flexor retinaculum, anterior surfaces of carpals
Contents
Median n.
Tendons of:
Flexor Digitorum Superficialis
Flexor Digitorum Profundus
Flexor Carpi Radialis
What are the borders and contents of the Anatomical Snuffbox?
Borders
Two sides: tendons of extensors pollicis longus and brevis; Floor: Scaphoid
Contents
Radial a.
