CH 8 the Appendicular Skeleton

What does the term "forearm" anatomically refer to?

from elbow to wrist.

What is the appendicular skeleton?

includes bones of the limbs and the supporting bone (pectoral and pelvic) girdles that connect them to the trunk allows you to move and manipulate things

What is an epicondyle?

processes that develop proximal to an articulation. They provide surface area for attachment.

Which bone articulates with the scapula at the glenoid cavity?

the humerus

Identify the bones that form the pectoral girdle, their function, and their superficial features.

the pectoral girdle consistent of 2 scapulae and 2 clavicles function: position shoulder joints and provides base for arm movement, moves upper limbs superficial features: acts as sites for muscle attachment

What does the term "arm" anatomically refer to?

the proximal portion of the upper limb from shoulder to elbow

Define and locate the radial nerve.

the radial nerve runs through the radial groove on the posterior side of the humerus. It is a large nerve that provides both sensory information from the posterior surface of the limb and motor control over the large muscles that straighten the elbow.

name the bones of the pectoral girdle.

Each of the two pectoral girdles consist of a clavicle (collarbone) and scapula (shoulder blade)

How would a broken clavicle affect the mobility of the scapula?

The clavicle attaches the scapula to the sternum and restricts the scapula's range of motion. when the clavicle is broken, the scapula has a greater than normal range of motion and is less stable.

Why is the portion of the elbow called the funny bone?

a hit at the posteriomedial surface of the elbow joint can strike the ULNAR NERVE which can produce temporary numbness and paralysis of muscles on the anterior surface of the forearm.

The condlyle of the humerus is divided up into two what articular regions?

the trochlea which is medial and the capitulum which is lateral