BSC1085 Lab Exam 4

Muscular System

Flexion

Decrease in joint angle from anatomical position

Extension

Return to anatomical position after part of body was flexed

Hyperextension

Extension beyond anatomical position

Abduction

Movement of the limbs in the coronal plane away from the body

Adduction

Return of the part of the body to its anatomical position

Circumduction

Proximal end of limb is relatively stationary while distal end is tracing a circle

Rotation (medial and lateral)

Movement of part of body around an axis (internal and external)

Pronation

medial rotation of the forearm and consequently the hand as well

Supination

Lateral rotation of the forearm and consequently the hand as well.

Inversion

Turning the sole of the feet medially so they face each other.

Eversion

Turning the soles of the feet laterally.

Plantar Flexion

pointing your foot downwards

Dorsiflexion

pointing your foot upwards

Sarcolemma

1

T tubule

2

Terminal Cisterna

3

Myofibril

4

Sarcoplasmic Reticulum

5

Neuromuscular Junction

6

M line

A

I Band

B

A Band

C

Origin

The stationary or less moveable bone that a muscle is attached to.

Insertion

The bone the is moved by the attached muscle

Agonist (prime mover)

Primary muscle directly responsible for producing a specific movement at a joint.(ex: biceps brachii)

Antagonists

Muscle that opposes or reverses the movement of the agonist. (Ex: Triceps brachii)

Synergists

Muscles that assist the agonist by adding extra force to the same movement or reducing unnecessary movement.

Fixator

special synergist that immobilizes a bone so the agonist has a stable base to exert force.

3: Deltoid

Identify which completes abduction of humerus

3: Deltoid

Identify which completes abduction of humerus

3: Deltoid

Identify which completes abduction of humerus

3: Deltoid

Identify which completes abduction of humerus

3: Deltoid

Identify which completes abduction of humerus

1: Erector Spinae

Identify which completes extend and rotates spine and head.

5: Infraspinatus

Identify which completes rotates arm laterally, stabilizes shoulder (Superior)

5: Infraspinatus

Identify which completes rotates arm laterally, stabilizes shoulder (Superior)

5: Infraspinatus

Identify which completes rotates arm laterally, stabilizes shoulder (Superior)

5: Infraspinatus

Identify which completes rotates arm laterally, stabilizes shoulder (Superior)

4: Teres Minor

Identify which completes rotates arm laterally, stabilizes shoulder (Inferior)

4: Teres Minor

Identify which completes rotates arm laterally, stabilizes shoulder (Inferior)

4: Teres Minor

Identify which completes rotates arm laterally, stabilizes shoulder (Inferior)

4: Teres Minor

Identify which completes rotates arm laterally, stabilizes shoulder (Inferior)

2: Latissimus dorsi

Identify which completes Arm extension, adduction, and medial rotation of arm

2: Latissimus dorsi

Identify which completes Arm extension, adduction, and medial rotation of arm

8: Subscapularis

Identify which completes Rotates arm medially, stabilizes shoulder

6: Supraspinatus

Identify which completes Extends head, shrug shoulders, fixes scapula

6: Supraspinatus

Identify which completes Extends head, shrug shoulders, fixes scapula.

6: Supraspinatus

Identify which completes Extends head, shrug shoulders, fixes scapula.

7: Trapezius

Identify which completes Extends head, shrug shoulders, fixes scapula.

7: Trapezius

Identify which completes Extends head, shrug shoulders, fixes scapula.

1: Biceps brachii

Indentify which completes flexes arm/forearm (superficial proximal)

1: Biceps brachii

Indentify which completes flexes arm/forearm (superficial proximal)

3: Brachialis

Indentify which completes flexes arm/forearm (Deep)

3: Brachialis

Indentify which completes flexes arm/forearm (Deep)

3: Brachialis

Indentify which completes flexes arm/forearm (Deep)

3: Brachialis

Indentify which completes flexes arm/forearm (Deep)

4: Brachioradialis

Indentify which completes flexes arm/forearm (Superficial Distal)

4: Brachioradialis

Indentify which completes flexes arm/forearm (Superficial Distal)

7: Coracobrachialis

Identify which completes flexes, adduces, and medially rotates humerus

9: Extensor digitorum

Identify which completes finger extension, extends hand.

9: Extensor digitorum

Identify which completes finger extension, extends hand.

9: Extensor digitorum

Identify which completes finger extension, extends hand.

5: Flexor carpi radialis

Identify which completes flexes and abducts wrist

5: Flexor carpi radialis

Identify which completes flexes and abducts wrist

5: Flexor carpi radialis

Identify which completes flexes and abducts wrist

6: Pronator Teres

Identify which completes pronates and flexes forearm

6: Pronator Teres

Identify which completes pronates and flexes forearm

6: Pronator Teres

Identify which completes pronates and flexes forearm

6: Pronator Teres

Identify which completes pronates and flexes forearm

8: Supinator

Identify which completes supinate forearm

8: Supinator

Identify which completes supinate forearm

2: Triceps brachii

Identify which completes extension of forearm, extends and adducts arm

2: Triceps brachii

Identify which completes extension of forearm, extends and adducts arm

5: Buccinator

Identify which completes compress cheek, sucking

5: Buccinator

Identify which completes compress cheek, sucking

5: Buccinator

Identify which completes compress cheek, sucking

5: Buccinator

Identify which completes compress cheek, sucking

3: Temporalis

Identify which completes Closes (elevates) mandible (superior)

6: Masseter

Identify which completes Closes (elevates) mandible (inferior)

6: Masseter

Identify which completes Closes (elevates) mandible (inferior)

1: Orbicularis oculi

Identify which completes Blinking and Squinting

1: Orbicularis oculi

Identify which completes Blinking and squinting

2: Orbicularis oris

Identify which completes Close lips, kissing, and whistling.

8: Splenius Capitis

Identify which completes Extend (hyperextend) and rotates head

4: Sternocleidomastoid

Identify which completes abducts, rotates, and flexes head

7: Zygomaticus major

Identify which completes smiling and laughing

7: Zygomaticus major

Identify which completes smiling and laughing

7: Internal intercostals

Identify which completes depresses ribs- aids in forced expiration

7: Internal intercostals

Identify which completes depresses ribs- aids in forced expiration

2: External oblique

Identify which completes Compresses abdominal wall and laterally rotates waist (superficial)

2: External oblique

Identify which completes Compresses abdominal wall and laterally rotates waist (superficial)

2: External oblique

Identify which completes Compresses abdominal wall and laterally rotates waist (superficial)

4: Internal oblique

Identify which completes Compresses abdominal wall and laterally rotates waist (deep)

4: Internal oblique

Identify which completes Compresses abdominal wall and laterally rotates waist (deep)

8: External Intercostals

Identify which completes elevates ribs- aids inspiration

5: Pectoralis major

Identify which completes flexes, adducts, and medially rotates humerus.

5: Pectoralis major

Identify which completes flexes, adducts, and medially rotates humerus.

6: Pectoralis minor

Identify which completes pulls scapula forward and inferior

6: Pectoralis minor

Identify which completes pulls scapula forward and inferior

3: Rectus abdominis

Identify which completes flexes spine and compresses abdominal wall