1. Selected groups of the body’s
muscles

2. origin and insertion Major concepts of muscle’s actions
1- Each muscle has to be supplied by a nerve
2- For a muscle to produce a movement it has to cross over a joint
3- Muscles are attached to bones through points of attachments called
origin and insertion
4- Usually the (insertion) moves towards the origin during contraction of the muscle
5- During contraction usually the muscle fibers shorten and this results in puling the insertion towards the origin over a joint

3. All muscles of the face are (CRANIAL NERVE NUMBER 7)
Selected muscles
ORBICULARIS OCULI
ORBICULARIS ORIS
Buccinator
All muscles of the face are
innervated by
THE FACIAL NERVE
(CRANIAL NERVE NUMBER 7)

4. The patient will not be able to close his eye on the affected side
Facial Muscle Paralysis
(Bell's palsy)
will cause distortion of the face
drooping of the lower eyelid,
and the angle of the mouth will sag on the affected side.
The patient will not be able to close his eye on the affected side .

5. MUSCLES OF THE EYE
There are two groups of muscles within the orbit:
1-extrinsic muscles of eyeball (extra-ocular muscles)
2-intrinsic muscles within the eyeball, which control the shape of the lens and size of the pupil
The extrinsic muscles include
THE LEVATOR PALPEBRAE SUPERIORIS
SUPERIOR RECTUS
INFERIOR RECTUS
MEDIAL RECTUS
LATERAL RECTUS
SUPERIOR OBLIQUE
INFERIOR OBLIQUE
Superior
Inferior
Lateral
medial
The intrinsic muscles include
THE CILIARY MUSCLE
THE SPHINCTER PUPILLAE
THE DILATOR PUPILLAE 6
muscles
4 recti muscles
2 oblique muscles
Superior
inferior
7muscles
+ 1 levator palpebrae superioris

6. Nerve supply: Trochlear nerve
1-LEVATOR PALPEBRAE SUPERIORIS
Nerve supply: Oculomotor nerve
Actions:Elevation of upper eyelid
2-SUPERIOR RECTUS
Nerve supply: Oculomotor nerve
3-INFERIOR RECTUS
Nerve supply: Oculomotor nerve
4-MEDIAL RECTUS
Nerve supply : Oculomotor nerve branch
5-Lateral rectus
Nerve supply: Abducent nerve [VI]
Action: Abduction of eyeball
6-Superior oblique
Nerve supply: Trochlear nerve
7-INFERIOR OBLIQUE
Nerve supply: Oculomotor nerve branch

7. by the oculomotor nerve (3)
All the muscles of the eye are innervated
by the oculomotor nerve (3)
except:
1-The lateral rectus (LR)
which is supplied by
THE ABDUCENT NERVE (CRANIAL NERVE 6)
2- The superior oblique muscle(SO)
which is supplied by
THE TROCHLEAR NERVE(4)
All THE MUSCLES OF THE EYE are supplied by cranial nerve number (3) except
(SO4+ LR6)

8. Muscles that connect the arm to the body

9. Site for intermuscular injections
Trapezius muscle
Deltoid muscle
Site for intermuscular injections

10. Pectoralis major
Flexes the shoulder joint

11. Sternocleidomastoid flexes the cervical portion of the vertebral
column and flexes the head.

12. Muscles Of The Upper Limbs
1- Muscles of the arm
2- Muscles of the forearm

13. 1-Biceps brachii 2-Brachialis 3-Coracobrachialis Brachialis is
The muscles of the arm are divided into two groups:
A- Muscles located in front of the humerus bone
(in the anterior compartment).
FLEXORS COMPARTMENT
1-Biceps brachii
2-Brachialis
BBC group
3-Coracobrachialis
Brachialis is
the main flexor of
the elbow joint

14. innervated by the Musculocutaneous nerve
The BBC group is
innervated by the Musculocutaneous nerve

15. Only one muscle but it has three heads
B-Muscles located behind the humerus
(in the posterior compartment)
EXTENSOR COMPARTMENT
Only one muscle but it has three heads
1-Triceps brachii
The main Extensor of the elbow joint
The triceps
is supplied by
the radial nerve

16. MEDIAL Notice that the brachial artery lies immediately to
The rounded tendon of
the Biceps brachii
Remember that you can
feel the
Pulse there

17. The bicipital aponeurosis (the flat tendon of the biceps brachii) separates the superficially located median cubital vein from the deeply located brachial artery

18. usually targeted by medical personal for different purposes)
Just for reading
Notice that the
median cubital vein
(the vein that is
usually targeted by medical personal
for different purposes)
is surrounded by superficial cutaneous nerves; the lateral cutaneous nerve and medial cutaneous nerve of the forearm

19. (Flexors) (Extensors) Muscles of the forearm
The muscles of the forearm are located in two groups
A- muscles
of anterior compartment
of the forearm
(Flexors)
B- muscles
of the posterior compartment
(Extensors)

20. The flexor digitorum profundus is supplied by:
Selected muscles of the anterior compartment of the forearm
1-Flexor digitorum profundus
This muscle is responsible for the
Flexion of the distal phalanx of
the medial four fingers
Flexor digitorum profundus
The flexor digitorum profundus is supplied by:
1-Median nerve
2-Ulnar nerve

21. 2- Flexor Carpi Radialis
This muscle flexes the wrist joint
Is supplied by the median nerve
THE RADIAL ARTERY
Notice that lateral to its
(flexor carpi radialis muscle) tendon
passes
THE RADIAL ARTERY
Remember that you can feel the pulse of the radial artery there

22. Is supplied by the radial nerve
Selected muscles of the posterior compartment
Extensor digitorum
This muscle extends the fingers
Is supplied by
the radial nerve

23. You have three options: 1-Musclocutaneous 2-Median nerve 3-Ulnar nerve
Summary of the motor nerves of the upper limbs
Muscles located in the anterior compartment of the arm and forearm
Muscles located in posterior compartment of the arm and forearm
You have three options:
1-Musclocutaneous
2-Median nerve
3-Ulnar nerve
You have only one option:
The radial nerve or
its deep branch
If the muscle is located in the anterior compartment of the arm
then it has to be supplied by the Musculocutaneous nerve
If the muscle is located in the anterior compartment of the forearm then it has to be supplied by the Median nerve except: the flexor carpi ulnaris and the lateral half of the flexor digitorum profundus, thye are supplied by the ulnar nerve

24. Muscles of the anterior wall
of the abdomen

25. Muscles of the Abdomenal wall
Rectus abdominis
External oblique
Internal oblique
Transversus abdominis