1. Gross Anatomy of the Muscular System
Lab
Week of February 25, 2008
Marieb & Mitchell: Exercise 15

2. MUSCLES OF THE HEAD see table 15.1 on facial expressions
raise eyebrows?
squint, blink?
smile?
kissing?
chewing?
frowning?
whistling?

3. MUSCLES OF THE NECK
primarily concerned with moving head and shoulder girdle
sternocleidomastoid
flex, rotation
scalenes
flex, rotation, elevation of ribs 1-2

4. MUSCLES OF THE TRUNK Activity 3
use your latissimus dorsi muscle to adduct your arm
use your deltoid muscle to abduct your arm
use your trapezius muscle to elevate your shoulder
use your pectoralis major by pressing your hands together in front of your chest

5. MUSCLES OF THE UPPER LIMBS
THREE groups
those that cause movement at the shoulder joint
those that cause movement at the elbow joint
those that cause movements at the wrist and hand joints

6. MUSCLES OF THE UPPER LIMBS
THREE groups
those that cause movement at the shoulder joint
IN GENERAL
these muscles originate on the axial skeleton or shoulder and insert on the humerus
EXAMPLES:
subscapularis, supraspinatus, infraspinatus, deltoid, etc…

7. MUSCLES OF THE UPPER LIMBS
THREE groups
those that cause movement at the elbow joint
IN GENERAL
these muscles originate at the humerus and insert into the forearm bones
ACTIONS: flex, extend, pronate, supinate
SEE TABLE 15.5

8. MUSCLES OF THE UPPER LIMBS
THREE groups
those that cause movements at the wrist and hand joints
IN GENERAL
originate on forearm muscles and insert on digits
see table 15.6

9. Activity 4 demonstrate action of biceps brachii and triceps brachii
flex your wrist
which muscles in Fig (pg 215) are at work?
Flare your fingers to identify the tendons of the extensor digitorum on the back of you hand (Fig , pg 217)

10. Muscles of the Lower Limbs
Movement at the hip, knee and foot joints:
we will identify these next week in the ADAM packet
Unlike the shoulder (scapula), the hip does not have specialized group of muscles for stabilization