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BIO 201 Muscles > BIO 2O1 Axial Muscles > Flashcards

BIO 2O1 Axial Muscles Flashcards

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Biology 101 flashcards
1
Q

Levator Palpebrae Superioris

A

A: Elevates upper eyelid

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2
Q

Orbicularis Oculi

A

A: closes eyes, helps tears flow across eye

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3
Q

Zygomaticus Major/Minor

A

A: elevates upper lip

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4
Q

Orbicularis Oris

A

A: closes lips, protrudes lips, uniquely developed in humans for speech

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5
Q

Temporalis

A

A: elevation of the mandible, chewing (mastication)

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6
Q

Masseter

A

A: elevation of the mandible, chewing (mastication)

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7
Q

Platysma

A

A: depression of the mandible

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8
Q

Digastric

A

O: Anterior Belly: Digastric fossa of the mandible
Posterior Belly: Mastoid process of the temporal bone
I: Hyoid bone
A: depression of the mandible (hyoid fixed), elevates hyoid (mandible fixed)

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9
Q

Stylohyoid

A

O: Styloid process of the temporal bone
I: Hyoid bone
A: Elevates/retracts hyoid

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10
Q

Mylohyoid

A

O: Inferior margin of the mandible
I: Hyoid bone
A: Elevates the floor of the mouth in swallowing

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11
Q

Sternohyoid

A

O: Manubrium of sternum, medial end of clavicle
I: Hyoid bone
A: Depression of the hyoid

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12
Q

Omohyoid

A

A: Depression of the hyoid

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13
Q

Thyrohyoid

A

O: Thyroid cartilage of the larynx
I: Hyoid bone
A: Depression of the Hyoid

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14
Q

Sternothyroid

A

O: Manubrium of sternum, costal cartilage
I: Thyroid cartilage of the larynx
A: Depresses the larynx

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15
Q

Sternocleidomastoid

A

O: Manubrium of sternum, medial 1/3 of clavicle
I: Mastoid process of the temporal bone
A: Unilateral action: contralateral; rotation of the head
Bilateral action: flexion of the neck

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16
Q

Scalenes

A

A: Bilateral action: neck flexion, elevation of ribs 1-2 (spine fixed), aid in breathing
Unilateral action: lateral flexion of the neck

17
Q

Semispinalis

A

A: Unilateral action: contralateral rotation of the neck
Bilateral action: extension of the head and neck

18
Q

External Intercostals

A

A: Expand the thoracic cavity (aiding in inspiration)

19
Q

Internal Intercostals

A

A: Depresses and retracts the ribs, compresses thoracic cavity, (aiding in expiration)

20
Q

Diaphragm

A

A: prime mover of inspiration, contraction aids in childbirth and expulsion of urine and feces

21
Q

Rectus Abdominis

A

A: flexion of the trunk, stabilizes pelvic region while walking, compresses abdominal viscera

22
Q

External Abdominal Oblique

A

A: support viscera, stabilizes vertebral column, maintains posture

23
Q

Internal Abdominal Oblique:

A

A: support viscera, stabilizes the vertebral column, maintains posture
Unilateral action: ipsilateral rotation of the waist

24
Q

Transverse Abdominis

A

A: compresses abdominal contents, does NOT contribute to vertebral column movements

25
Q

Linea Alba

A

Li

26
Q

Spinalis

A

A: unilateral action: lateral flexion of the vertebral column
bilateral action: extension of the vertebral column

27
Q

Longissimus

A

A: depresses the ribs
Unilateral action: lateral flexion of vertebral column, contralateral rotation of the head
Bilateral action: extension of the vertebral column, extension of the head,

28
Q

Iliocostalis

A

A: unilateral action: lateral flexion of the vertebral column
extension action: of vertebral column; depresses the ribs

29
Q

Serratus Anterior

A

A: protracts the scapula, prime mover in all forward-reaching and pushing actions, fixes scapula during abduction of the arm

30
Q

Pectoralis Minor

A

O: Ribs 3-5, and overlying fascia
I: Coracoid process of scapula
A: protracts the scapula

31
Q

Pectoralis Major

A

O: Medial 1/2 clavicle, lateral margin of sternum, costal cartilages 1-7, aponeurosis of external oblique
I: intertubercular sulcus of humerus
A: flexion of the shoulder, adduction of the shoulder, medial rotation of the shoulder

32
Q

Levator Scapulae

A

A: elevates scapula (cervical vertebrae fixed), lateral flexion of the back (scapula fixed), retracts and braces shoulder

33
Q

Rhomboideus Major

A

A: retracts scapula

34
Q

Latissimus Dorsi

A

A: adduction of the shoulder, extension of the shoulder, medial rotation of the shoulder

35
Q

Trapezius

A

A: stabilizes scapula and shoulder during the arm movements, elevates/depresses shoulder, rotates and retracts scapula

36
Q

Coracobrachialis

A

O: Coracoid process of scapula
I: Medial aspect of humeral shaft
A: shoulder flexion, medial rotation of shoulder

BIO 201 Muscles (1 decks)

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