Question

Muscle names often come with descriptive prefixes that indicate their location or action. For the following terms, provide the (1) definition and (2) example of a muscle in the upper extremity that contains this term.

a. Major
1.______________________
2.______________________
c. Carpi
1.______________________
2.______________________
e. Pollicis
1.______________________
2.______________________
g. Brevis
1.______________________
2.______________________
b. Extensor
1.______________________
2.______________________
d. Spinatus
1.______________________
2.______________________
f. Minimi
1.______________________
2.______________________
h. Ulnaris
1.______________________
2.______________________

Answer 1

Here are the definitions and examples for each term:

a. Major:

1. Large or important
2. Pectoralis major muscle in the chest.

c. Carpi:

1. Related to the wrist
2. Flexor carpi ulnaris muscle in the forearm.

e. Pollicis:

1. Related to the thumb
2. Abductor pollicis longus muscle in the forearm.

g. Brevis:

1. Short
2. Extensor pollicis brevis muscle in the forearm.

b.Extensor:

1. Muscle that increases the angle at a joint
2. Extensor digitorum muscle in the forearm.

d. Spinatus:

1. Related to the spine
2. Infraspinatus muscle in the shoulder.

f. Minimi:

1. Small
2. Abductor digiti minimi muscle in the hand.

h. Ulnaris:

1. Related to the ulna bone in the forearm
2. Flexor carpi ulnaris muscle in the forearm.

Step-by-step explanation:

The prefixes used in muscle names often indicate the location or action of the muscle. For example, the prefix bi in biceps brachii indicates that the muscle has two origins, while the prefix tri in triceps brachii indicates three origins. Another way muscles are named is based on their attachment locations. For instance, the sternocleidomastoid muscle has origins on the sternum and clavicle and inserts on the mastoid process of the temporal bone.

Lastly, some muscles are named after the movement they produce. Examples include flexor (decreases the angle at a joint), extensor (increases the angle at a joint), abductor (moves the bone away from the midline), and adductor (moves the bone toward the midline).