Test #6 - Class 10: Muscles 1-4; Class 11: Muscles 12-19 Flashcards
Clay Color: Terra Cotta (TC)
Superficial muscles
Clay Color: Orange (O)
Intermediate muscles
Clay Color: Pink (P)
Deep muscles
Clay Color: Buff (B)
Connective tissue (tendons & ligaments)
Terminology: Muscle Belly
They fleshy, meaty portion of a muscle. It is innervated (nerve supply) & vascular (blood supply).
Terminology: Muscle Tendon
Parallel arranged collagen fibers which attach the muscle belly to bone.
What forces do muscle tendons resist?
Tensile forces (pulling apart)
Terminology: Aponeurosis
A broad sheet-like tendon which attaches muscle to muscle, bone or skin.
Terminology: Origin
The attachment of a muscle to the LESS moveable bone.
Terminology: Insertion
The attachment of muscle to the MORE moveable bone.
New Terminology: Proximal or Superior
Refers to the origin of a muscle attachment.
New Terminology: Distal or Inferior
Refers to the insertion of a muscle attachment.
Terminology: Fasciculi
A grouping of muscle cells surrounded by connective tissue.
How many arrangements of fasciculi?
4 arrangements
What are the 4 arrangements of fasciculi?
- Parallel; 2. Pennate; 3. Convergent; and 4. Circular
Arrangement of Fasciculi: Parallel
The fascicles are lined up in a parallel fashion.
Arrangement of Fasciculi: Pennate
“Winged or feathered”
- Unipennate (|/////); 2. Bipennate (/////|\\); and 3. Multipennate (⫞⫟⫠|⫞⫟⫠)
Arrangement of Fasciculi: Convergent
Fascicles converged at one point.
Arrangement of Fasciculi: Circular
Fascicles are arranged in a circle.
How many ways are skeletal muscles named?
7 ways
What are the 7 ways skeletal muscles are named?
- Relative size; 2. Location; 3. Shape; 4. Direction of muscle fibers; 5. Number of origins; 6. Location of the muscle attachment points; and 7. Action
Naming Skeletal Muscles: Relative Size
e.g. Gluteus maximus, gluteus medius, and gluteus minimus
Naming Skeletal Muscles: Location
e.g. Tibialis anterior
Naming Skeletal Muscles: Shape
e.g. Deltoid (triangular); Trapezius (trapezoidal)
Naming Skeletal Muscles: Direction of Muscle Fibers
e.g. Abdominis: Rectus = parallel to midline; Transverse = perpendicular to midline; Oblique = diagonal to midline
Naming Skeletal Muscles: Number of Origins
e.g. Biceps (2); Triceps (3)
Naming Skeletal Muscles: Location of Muscle Attachment Points
e.g. sternocleidomastoid (sternum, clavicle & mastoid process)
Naming Skeletal Muscles: Action
e.g. Flexors (flexorcarpiulnaris), Extensors, ABductors, ADductors,
How many rotator cuff muscles?
4 muscles
What are the 4 rotator cuff muscles?
- Supraspinatus; 2. Infraspinatus; 3. Teres Minor; and 4. Subscapularis
“SITS”
Rotator Cuff Muscle: Supraspinatus*
General Location: Posterior, Shoulder, Deep
Origin: Supraspinous fossa of the Scapula
Insertion: Greater tubercle of the Humerus (Superior facet)
Rotator Cuff Muscle: Infraspinatus*
General Location: Posterior, Shoulder, Superficial
Origin: Infraspinous fossa of the Scapula
Insertion: Greater tubercle of the Humerus (Middle facet)
Rotator Cuff Muscle: Teres Minor*
General Location: Posterior, Axilla, Superficial
Origin: Superior 1/2 of the Lateral border of the Scapula
Insertion: Greater tubercle of the Humerus (Inferior facet)
Rotator Cuff Muscle: Subscapularis*
General Location: Anterior, Scapula, Deep
Origin: Subscapular fossa of the Scapula
Insertion: Lesser tubercle of the Humerus
How many scapula & posterior arm muscles?
2 muscles
What are the 2 scapula & posterior arm muscles?
- Teres Major; and 2. Triceps Brachii
Scapula & Posterior Arm Muscle: Teres Major*
Gen Loc: Posterior, Axilla, Superficial
Origin: Inferior angle (lateral side of) and lower 1/2 of the lateral border of the Scapula
Insertion: Bicipital groove of the Humerus (medial lip)
Scapula & Posterior Arm Muscle: Triceps Bracii*
Gen Loc: Posterior, Arm, Superficial
Origin: 1) Long Head: Infraglenoid tubercle of the Scapula; 2) Lateral Head: Posterior, proximal half of the Humerus; 3) Medial Head: Posterior, distal half of the Humerus
Insertion: Olecrannon process of the Ulna
How many anterior arm muscles?
2 muscles
What are the 2 anterior arm muscles?
- Brachialis; and 2. Biceps Brachii
Anterior Arm Muscle: Brachialis*
GL: Anterior, Arm, Deep
O: Distal 1/2 of the anterior surface of the Humerus
I: Coronoid process and tuberosity of the Ulna
Anterior Arm Muscle: Biceps Brachii*
GL: Anterior, Arm, Superficial
O: 1) Short Head: Coracoid process of the Scapula; 2) Long Head: Supraglenoid tubercle of the Scapula
I: Radial tuberosity and Aponeurosis of the Biceps Brachii to proximal Ulna
How many lateral shoulder (shoulder cap) muscles?
1 muscle
What is the 1 lateral shoulder (shoulder cap) muscle?
- Deltoid
Lateral Shoulder Muscle: Deltoid*
GL: Lateral, Shoulder, Superficial
O: 1) Anterior: Lateral 1/3 of the Clavicle; 2) Middle: Acromion; 3) Posterior: Spine of the Scapula
I: Deltoid tuberosity of the Humerus
How many deep layer of the forearm muscles?
1 muscle
What is the 1 deep layer of the forearm muscle?
- Supinator
Deep Layer of the Forearm Muscle: Supinator
GL: POSTERIOR, LATERAL, FOREARM, DEEP
O: Lateral epicondyle of the Humerus and posterior border of the Ulna
I: Proximal 1/3 of the Radius
How many superficial layer of the posterior forearm muscles?
2 muscles
What are the 2 superficial layer of the posterior forearm muscles?
- Extensor Carpi Radialis Brevis; and 2. Extensor Carpi Radialis Longus
Superficial Layer of the Posterior Forearm Muscle: Extensor Carpi Radialis Brevis*
GL: Posterior, Forearm, Superficial
O: Lateral epicondyle of the Humerus (common extensor tendon)
I: Base of the 3rd Metacarpal
Superficial Layer of the Posterior Forearm Muscle: Extensor Carpi Radialis Longus*
GL: Posterior, Forearm, Superficial
O: Lateral supracondylar ridge of the Humerus
I: Base of the 2nd Metacarpal
How many deep layer of the posterior forearm muscles?
4 muscles
What are the 4 deep layer of the posterior forearm muscles?
- Extensor Indicis; 2. Extensor Pollicis Brevis; 3. Extensor Pollicis Longus; and 4. ABductor Pollicis Longus
Deep Layer of the Posterior Forearm Muscle: Extensor Indicis
GL: POSTERIOR, FOREARM, DEEP
O: Ulna & Interosseous membrane
I: Base of the intermediate Phalanx of the index finger (extensor expansion)
Deep Layer of the Posterior Forearm Muscle: Extensor Pollicis
GL: POSTERIOR, FOREARM, DEEP
O: Radius & Interosseous membrane
I: Base of the proximal Phalanx of the thumb
Deep Layer of the Posterior Forearm Muscle: Extensor Pollicis Longus
GL: POSTERIOR, FOREARM, DEEP
O: Middle 1/3 of the Ulna and Interosseous membrane
I: Base of the distal Phalanx of the thumb
Deep Layer of the Posterior Forearm Muscle: ABductor Pollicis Longus
GL: POSTERIOR, FOREARM, DEEP
O: Ulna, Radius and Interosseous membrane
I: Base of the 1st Metacarpal
The separation between what 2 tendons creates the anatomical snuffbox?
- Extensor Pollicis Brevis; and 2. Extensor Pollicis Longus
How many superficial layer of the posterior forearm muscles?
3 muscles + 1 retinaculum
What are the 3 superficial layer of the posterior forearm muscles + 1 retinaculum?
- Extensor Digitorum; 2. Extensor Carpi Ulnaris; 3. Extensor Retinaculum; and 4. Anconeus
Superficial Layer of the Posterior Forearm Muscle: Extensor Digitorum*
GL: Posterior, Forearm, Superficial
O: Lateral epicondyle of the Humerus (common extensor tendon)
I: Distal Phalanges of the medial 4 digits (extensor expansion of the medial 4 digits)
Superficial Layer of the Posterior Forearm Muscle: Extensor Capri Ulnaris*
GL: Posterior, Forearm, Superficial
O: Lateral epicondyle of the Humerus (common extensor tendon)
I: Base of the 5th Metacarpal
Superficial Layer of the Posterior Forearm Retinaculum: Extensor Retinaculum
GL: CONNECTIVE TISSUE BAND AROUND THE POSTERIOR WRIST
O: Band attaches at the distal Radius and Ulna
Superficial Layer of the Posterior Forearm Muscle: Anconeus*
GL: Posterior, Forearm, Superficial
O: Lateral epicondyle of the Humerus
I: Olecrannon process and lateral edge of the Ulna shaft