chapter 15 & 16
Trapezius (superficial layer)
Innervation: Accessory Nerve (CN XI)
Function:
Scapular elevation, depression, retraction
Rotate Glenoid cavity superiorly
Latissimus dorsi (superficial layer)
Innervation: Thoracodorsal N
Function:
Humerus extension, medial rotation, & adduction
Rhomboids (superficial layer)
Innervation: Dorsal Scapular N
Function:
Scapular retraction
Rotate glenoid cavity inferiorly
Teres Major (superficial layer)
Innervation: Lower subscapular nerve (C5)
Function:
arm adduction & medial rotation
Supraspinatus (deep layer; rotator cuff)
Innervation: Suprascapular N
Function:
arm abduction (initiate & assist)
Infraspinatus (deep layer; rotator cuff)
Innervation: Suprascapular N
Function:
laterally rotate arm
Teres Minor (deep layer; rotator cuff)
Innervation: Axillary N
Function: laterally rotate arm
Subscapularis (Deep layer; rotator cuff)
Innervation: U/L Subscapularis Ns
Function: arm medial rotation
Pectorals: Pectoralis Major
Innervation: Lat./Med. Pectoral N
Function: Arm flexion + Adduction
Pectorals: Pectoralis Minor
Innervation: Medial Pectoral N
Function: Scapular protraction + Stabilization
Pectorals: Serratus Anterior
Innervation: Long Thoracic N
Function: Protract + Stabilize scapula
(same as pec. minor)
Deltoid
Innervation: Axillary N
Function: Arm Flexion, Extension, Abduction
Biceps Brachii (arm flexors)
Innervation: Musculocutaneous N
Function: supination (tendon), minor flexion (aponeurosis)
short head: attaches to coracoid process
long head: attaches to humerus
Coracobrachialis (arm flexor)
Innervation: Musculocutaneous N
Function: arm flexion
note: deep to biceps brachii; attaches to coracoid process
Brachialis (arm flexor)
Innervation: Musculocutaneous N
Function: flex forearm (bottom arm part)
Triceps (Arm extensors)
Innervation: Radial N
Function: arm extension (long head), forearm extension (both heads)
Bones of the elbow
Forearm Flexors (Superficial layer): Pronator Teres
Innervation: Median N
Function: Pronation
Forearm Flexors (Superficial layer): Flexor carpi radialis
Innervation: Median N
Function: Abduct (radial deviation) + Flex wrist
Forearm Flexors (Superficial layer): Palmaris Longus
Innervation: Median N
Function: Tense Palmar Skin
Forearm Flexors (Superficial layer): Flexor Carpi Ulnaris
Innervation: Ulnar N
Function: Adduct (ulnar deviation) & Flex Wrist
Forearm Flexors (Superficial layer): Brachioradialis
Innervation: Radial N
Function: Flex elbow
Forearm Flexors (middle layer): Flexor Digitorium Superficialis
Innervation: Median N
Function: PIP Flexion
Forearm Flexors (deep layer): Flexor Digitorium Profundus
Innervation: Ulnar N
Function: DIP Flexion
Forearm Flexors (deep layer): Pronator Quadratus
Innervation: Median N
Function: forearm pronation
Forearm Extensors: Supinator
Innervation: Radial N
Function: supination
Forearm Extensors: Extensor Carpi Radialis
Innervation: Radial N
Function: Abduct + Extend Wrist
Forearm Extensors: Extensor Digitorium & Extensor Digiti Minimi
Innervation: Radial N
Function: Extend digits @MCP Joint
Forearm Extensors: Extensor Carpi Ulnaris
Innervation: Radial N
Function: Adduct + Extend Wrist
yeah
Outcropping Muscles: Abductor Pollicis Longus
Innervation: Radial N
Function: Abduct thumb @ CMC
Outcropping Muscles: Extensor Pollicis Longus
Innervation: Radial N
Function: Extend @MCP, CMC, IP joints
Outcropping Muscles: Extensor Pollicis Brevis
Innervation: Radial N
Function: Extend @ MCP + CMC joints
Outcropping Muscles: Extensor Indicis
Innervation: Radial N
Function: Extend 2nd Digit