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Kinesiology: Muscles of the Human Body
This set of flashcards tests the origin, insertion, and innervation of muscles of the upper extremity.
5
Physiology
Graduate
09/04/2011

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Term
Trapezius
Definition
ORIGIN:

Upper- Occupit, Ligamentum nuchae, C7 vertebra (spinous process)

Middle- T1-T5 vertebrae (spinous processes), supraspinous ligaments

Lower- T6-T12 vertebrae (spinous processes), supraspinous ligaments

INSERTION:

Upper- Clavicle (posterior surface, lateral 1/3)

Middle- Scapula (middle margin of acromion); spine of scapula and crest of its superior lip

Lower- Scapula (spine: tubercle at lateral apex and aponeurosis at root of spine)

FUNCTION:

All- Stabilizes scapula during movements of the arm.

Upper and Lower- Rotation of the scapula so glenoid faces up

Upper- Elevation of scapula, shrugging; rotation of head to opposite side; capital and cervical extension

Middle - Scapular adduction (retraction)

Lower- Scapular adduction, depression, and upward rotation

INNERVATION:

Accessory (XI) nerve
Term
Rhomboid Major
Definition
ORIGIN: T2-T5 vertebrae, supraspinous ligaments
INSERTION: Scapula (medial border)
FUNCTION: Scapular adduction; downward rotation of scapula; scapular elevation
INNERVATION: C5 dorsal scapular nerve
Term
Rhomboid Minor
Definition
ORIGIN: C7-T1 vertebrae, ligamentum nuchae (lower)
INSERTION: Scapula (root of spine and on medial border)
FUNCTION: Scapular adduction; scapular downward rotation; scapular elevation
INNERVATION: C5 dorsal scapular nerve
Term
Levator Scapulae
Definition
ORIGIN: C1-C4 vertebrae (transverse processes and posterior tubercles)
INSERTION: Scapula (vertebral border b/c superior angle and root of spine)
FUNCTION: Elevates and adducts scapula; scapular downward rotation; lateral bending of cervical spine to same side; cervical rotation and extension
INNERVATION: C3-C4 spinal nerves, C5 dorsal scapular nerve
Term
Serratus Anterior
Definition
ORIGIN: Ribs 1-8; aponeurosis of intercostal muscles
INSERTION: Scapula (ventral surface of whole vertebral border)
First digitation- Superior angle of scapula on anterior aspect
Second and third digitations- Anterior (costal) surface of whole vertebral border
Fourth to eighth digitations- Inferior angle of scapula (costal surface)
FUNCTION: Scapular ABduction; upward rotation of the scapula; prevents "winging"
INNERVATION: C5-C7 long thoracic nerve
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