Chapter 8: Human Muscular System Flashcards by Rene Galindo

Q

What are the head muscles?

A

Occipitofrontalis
Temporalis
Orbicularis oculi
Zygomaticus major
Orbicularis oris
Masseter

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Q

What is this muscle?

A

Occipitofrontalis
- Frontal belly
- Occipital belly

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Q

What is this muscle?

A

Temporalis

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Q

What is this muscle?

A

Orbicularis oculi
Action - Closes eye

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Q

What is this muscle?

A

Zygomaticus major
Action - Elevates corner of mouth

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Q

What is this muscle?

A

Orbicularis oris
Action - Purses lips

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Q

What is this muscle?

A

Masseter
Action - Elevates jaw

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Q

What are the neck muscles?

A

Platysma
Digastric
Mylohyoid
Sternohyoid
Sternothyroid
Thyrohyoid
Scalene(s)
Sternocleidomastoid

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Q

What is this muscle?

A

Platysma

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Q

What is this muscle?

A

Digastric
(Located under the jaw. Has two heads)

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Q

What is this muscle?

A

Mylohyoid

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Q

What is this muscle?

A

Sternohyoid

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Q

What is this muscle?

A

Sternothyroid

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Q

What is this muscle?

A

Thyrohyoid

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Q

What is this muscle?

A

Scalene

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Q

What is this muscle?

Study These Flashcards

A

Sternocleidomastoid
Action - Flexes neck
(Medial and lateral head)

Q

What are the anterior trunk muscles?

Study These Flashcards

A

Pectoralis major
Pectoralis minor
Serratus anterior
External intercostal(s)
Internal intercostal(s)
Rectus Abdominus
External oblique
Internal oblique
Transverse abdominis
Linea Alba (structure not muscle)
Diaphragm

Q

What is this muscle?

Study These Flashcards

A

Pectoralis major
Origin - Sternal end of clavicle, sternum, Cartilage of ribs 1-6
Insertion - Greater tubercle of humerus
Action - Flexes arm

Q

What is this muscle?

Study These Flashcards

A

Pectoralis minor
Action - Protracts and rotates scapula inferiorly

Q

What is this muscle?

Study These Flashcards

A

Serratus anterior

Q

What is this muscle?

Study These Flashcards

A

External intercostal
Action - Elevates ribs

Q

What is this muscle?

Study These Flashcards

A

Internal intercostal
Action - Depresses ribs

Q

What is this muscle?

Study These Flashcards

A

Rectus Abdominis
Action - Flexes vertebral column

Q

What is this muscle?

Study These Flashcards

A

External Oblique (what direction do fibers point)

What is this muscle?

Internal oblique

What is this muscle?

Transversus abdominis

What is this structure?

Linea Alba

What is this muscle?

Diaphragm

What muscles are involved in the posterior trunk muscles?

- Trapezium - Latissimus dorsi - Splenius capitis - Levator scapulae - Rhomboid minor - Rhomboid major - Teres Major - Erector spinae group composed of Spinalis, longissimus, and iliocostalis

What is this muscle?

Trapezium

What is this muscle?

Latissimus dorsi Origin - Lower 6 thoracic vertebrae via thoracolumbar fascia, lumbar vertebrae and iliac crest Insertion - Intertubercular sulcus of humerus Action - Extends arm

What is this muscle?

Splenius capitis Action - Extends neck

What is this muscle?

Levator scapulae

What is this muscle?

Rhomboid minor

What is this muscle?

Rhomboid major

What is this muscle?

Teres major

What makes up the spinae group?

- Spinalis - Longissimus - Iliocostalis Action - Extends vertebral column