PRE-LAB QUIZ Before you begin, read all the activities in Exercise 12 and the re

Question

PRE-LAB QUIZ Before you begin, read all the activities in Exercise 12 and the required reading in your textbook that is assigned by your instructor 1. During this laboratory exercise, you will use to trace the paths of muscles on a skeleton. 2. True or False: The levator scapulae and rhomboids connect the scapula to the vertebral column. 3. Rotator cuff muscles connect the scapula to the greater and lesser tubercles of the 4. True or False: The coracobrachialis is in the posterior compartment of the arm. 5. The 6. All muscles with pollicis in their names will act on the 7. True or False: Both the piriformis and obturator internus muscles lie partly within the on the humerus is called the common flexor origin. 8. 9. 10. pelvic cavity and partly within the gluteal region. True or False: The quadriceps femoris muscles are located in the posterior thigh. The groin muscles are located in what region of the thigh? The extensor digitorum longus muscle is located in the compartment of the leg

Explanation / Answer

1. During this laboratory exercise, ypu will use color atlas of muscles to trace the paths of muscles on a skeleton.

Color atlas will help in locating different muscles and trace them to their origin.

2. The levator scapulae and rhomboids connect the scapula to the vertebral column.- TRUE

The rhomboid major is a skeletal muscle on the back that connects the scapula with the vertebrae of the spinal column. The levator scapulae muscle is situated at the back and side of the neck and its main function is to lift the scapula. The levator scapulae muscle originates from the cervical vertebrae one to four and is inserted into medial border of the scapula. Thus both muscles connect scapula with the spine.

3. Rotator cuff muscles connect scapula to the greater and lesser tubercles of the humerus.

The rotator cuff muscles arise from the scapula and connect to the head of the humerus. These muscles are named so as they form a cuff at the shoulder joint.

4. The coracobrachialis is the posterior compartment of the arm - FALSE

The coracobrachialis is one of the three muscles present in the anterior (fascial) compartment of the arm. The other two muscles are biceps brachii and brachialis

5 The medial epicondyle on the humerus is called the common flexor origin.

Origin of long flexor muscles on the anterior compartment of the forearm is the “common flexor origin” and is place of medial epicondyle of humerus.

6. All muscles with pollicis in their name will act on the thumb.

There are nine skeletal muscles located in the hand and forearm which act on the thumb. The muscles acting on thumb are named ‘pollicis’ eg; flexor pollicis longus, flexor pollicis brevis, abductor pollicis longus etc.

7. Both the piriformis and obturator internus muscles lie partly within the pelvic cavity and partly within the gluteal region.- TRUE

The gluteal region muscles move the lower limb at the hip joint. These muscles broadly divided into two groups viz;    Superficial abductors and extenders and deep lateral rotators. Piriformis and obturator internus are the muscles in the deep lateral rotators category.

8.The quadriceps femoris muscles are located in the posterior thigh -TRUE

The quadriceps femoris is a flat, quadrilateral skeletal muscle that is located on the posterior side of the hip joint.

9. The groin muscles are located in what region of the thigh?

The groin muscles are located on the medial side of the thigh.

10. The extensor digitorum longus muscle is located in the anterior compartment of the leg.

The extensor digitorum longus muscle is located at the front of the leg and is adjacent to the peroneus brevis muscle and the tibialis anterior muscle.

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