Brachial Plexus Flashcards
Roots (5)
- C5
- C6
- C7
- C8
- T1
Trunks (3)
-Superior
-Middle
-Inferior
Divisions (3)
-Anterior
-Posterior
-Anterior
Cords (3)
-Lateral
-Posterior
-Medial
Branches (5)
-Musculocutaneous
-Axillary
-Radial
-Median
-Ulnar
Motor branch movement & Innervation: Musculocutaneous
Movement: innervates several shoulder and elbow flexors essential for ADL and IADL function
Innervation: C5-C7
Motor branch movement & Innervation: Axillary
Movement: innervates the deltoid and teres minor, which position and stabilize the shoulder for reaching.
Innervation: C5 & C6
Motor branch movement & Innervation: Radial
Movement: innervates muscles that extend the elbow, wrist, fingers, and thumb, which are essential for object manipulation and stable grasp - All of the motor innervation of the radial nerve occurs proximal to the wrist
Innervation: C5 - T1
Motor branch movement & Innervation: Median
Movement: innervates key muscles that contribute to forearm pronation, finger flexion, and thumb motion - precise fine motor control and pinch
Innervation: C6-T1
Motor branch movement & Innervation: Ulnar
Movement: innervates two muscles near the elbow that flex the wrist and fingers - hand grip and lateral pinch.
Innervation: C8 & T1
What nerves branch off the ROOTS and from where?
Root C5:
Dorsal Scapular
Roots C5, C6, & C7
Long Thoracic
What nerves branch off the TRUNKS and from where?
Superior Trunk:
Suprascapular- C5 & C6
What nerves branch off the CORDS and from where?
*Lateral Cord:
Lateral Pectoral- C5, C6, & C7
*Posterior Cord:
Upper Subscapular- C5 & C6
Thoracodorsal- C6, C7, & C8
Lower Subscapular- C5 & C6
*Medial Cord:
Medial Pectoral- C8 & T1
Median Cutaneous Forearm-C8 & T1
Median Cutaneous Arm- C8 & T1
