Lecture 8: Appendicular Musculature Flashcards
What kind of nerves are the appendicular musculature innervated by?
Spinal nerves
What organization do Appendicular nerves go through?
They form Plexuses
Which nerve plexus serves the upper limbs?
Brachial Plexus
Which Nerve Plexus serves the lower limbs?
Lumbosacral plexus
Which appendicular nerve is the only nerve not innervated Spinal nerve?
The trapezius
What do the Anterior components of appendicular muscular do?
Help with flexion
What do the Posterior component of muscles help with?
Extension
What is each compartment associated with?
One nerve
What are the two Girdles?
- Pectoral
* Pelvic
What are the 3 characteristics of Appendicular Musculature?
- Innervation by spinal nerves
- Attachments on axial and appendicular skeleton
- Movement through muscle contraction
What innervates the upper limbs?
The Brachial Plexus
What kind of nerve innervates the trapezius?
Cranial nerve
What are the 4 major muscle groups of the Upper limbs?
- Shoulder (Pectoral girdle)
- Arm
- Forearm
- Hand
What is interesting about the Scalpua?
It is a free floating bone and is able to move separately from the arm
What are the major characteristics of the Upper Limb Musculature?
- Innervated by the brachial plexus
* Four major muscle groups
What are the major functions of upper limb musculature?
- Mobility
* Reaching, throwing, grasping, manipulating
Where does the Scapula lie?
Flat on the Thoracic cage
What is the movement of the Scapula when you go to hug someone?
Protraction
What is the movement of the Scapula when you bring it closer to the spinal column?
Retraction
Why is the arm able to go even higher?
The scapula rotates and and allows the clavicle and the chromium to rotate
What is needed to rotate the arm all the way up?
Rotation of the Scapula
What movement allows us to Shrug?
Elevation of the Scalpula
What are the 4 muscles that move the Pectoral Girdle?
Trapezius
Levator Scapulae
Rhomboids
Serratus Anterior
Where does the Trapezius attach?
Occipital and spinous processes to clavicle and scapular spine