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Anatomy > CH 10 and 11 (muscle origins, insertions, actions, and innervations) > Flashcards

CH 10 and 11 (muscle origins, insertions, actions, and innervations) Flashcards

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1
Q

Buccinator

A

O: alveolar processes of maxilla and mandible opposite the molar teeth
I: blends into fibers of orbicularis oris
A: compresses cheeks
N: Facial nerve

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2
Q

Mentalis

A

O: incisive fossa of mandible
I: skin of chin
A: elevates, everts, and protrudes lower lip

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3
Q

Orbicularis Oris

A

O: maxilla and mandible
I: lips
A: compresses, purses lips

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4
Q

Risorius

A

O: fascia surrounding parotid salivary gland
I: angle of mouth
A: draws corner of mouth laterally

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5
Q

Zygomaticus major

A

O: zygomatic bone near the zygomaticotemporal suture
I: fibers of levator anguli oris, orbicularis oris, and other muscles at angle of mouth
A: elevates corner of mouth and draws it laterally

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6
Q

Orbicularis oculi

A

O: medial margin of orbit
I: skin around eyelids
A: closes eye
N: facial nerve

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7
Q

Occipitofrontalis ( frontal belly)

A

O: epicranial aponeurosis
I: skin of eyebrow and bridge of nose
A: raises eyebrows, wrinkles forehead

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8
Q

Occipitofrontalis (occipital belly)

A

O: superior nuchal line and adjacent region of mastoid portion of the temporal bone
I: epicranial aponeurosis
A: tenses and retracts scalp

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9
Q

Temporoparietalis

A

O: fascia around external ear
I: epicranial aponeurosis
A: tenses scalp, moves auricle of ear

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10
Q

Masseter

A

O: aponeurosis and bones of the zygomatic arch
I: lateral surface and angle of mandibular ramus
A: elevates mandible closes jaws; assists in protracting and retracting mandible and moving it side to side
N: trigeminal nerve, mandibular branch

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11
Q

Temporalis

A

O: along temporal lines of the skull
I: coronoid process of mandible and the anterior border of the mandibular ramus
A: elevates mandible and closes jaws; assists in retracting and moving mandible from side to side

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12
Q

Diagastric anterior belly

A

O: from inferior surface of mandible at chin
I: hyoid bone
A: depresses mandible, opening mouth, and or elevates larynx
N: trigeminal nerve and mandibular branch

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13
Q

Geniohyoid

A

O: medial surface of mandible at chin
I: hyoid bone
A: depresses mandible, opening mouth, elevates larynx, and retracts hyoid bone

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14
Q

Mylohyoid

A

O: mylohyoid line of mandible
I: median CT band that runs to hyoid bone
A: elevates floor of mouth, elevates hyoid bone, and or depresses mandible

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15
Q

Sternohyoid

A

O: clavicle and manubrium
I: hyoid bone
A: depresses hyoid bone and larynx
N: cercival spinal nerves

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16
Q

Sternothyroid

A

O: dorsal surface of manubrium and first costal cartilage
I: thyroid cartilage of larynx
A: depresses hyoid bone and larynx

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17
Q

Thyrohyoid

A

O: thyroid cartilage of larynx
I: hyoid bone
A: elevates larynx, depresses hyoid bone

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18
Q

Sternocleidomastoid

A

Clavicular head:
O: attaches to sternal end of clavicle
Sternal head:
O: attaches to manubrium
I: mastoid region of skull and lateral portion of superior nuchal line
A: together they flex the neck; alone one side bends the neck toward shoulder and turns face to opposite side
N: accessory nerve and cervical spinal nerves of cervical plexus

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19
Q

External intercostals

A

O: inferior border of each rib
I: superior border of more inferior rib
A: elevate ribs
N: intercostal nerves

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20
Q

Internal intercostals

A

O: superior border of each rib
I: inferior border of the more superior rib
A: depress ribs

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21
Q

Serratus posterior ( inferior)

A

O: aponeurosis from spinous processes of T11-L2 or L3
I: inferior border of ribs 9-12
A: pulls ribs inferiorly; also pulls outward, opposing diaphragm

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22
Q

External oblique

A

O: exterior and inferior borders of ribs 5-12
I: external oblique aponeurosis extending to linea alba and iliac cest
A: compresses abdomen; depresses ribs; flexes, laterally flexes, or rotates vertebral column to the opposite side

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23
Q

Internal oblique

A

O: thoracolumbar fascia, inguinal ligament, and iliac crest
I: inferior surfaces of ribs 9-12 costal cartilages 8-10, linea alba, and pubis
A: compresses abdomen; depresses ribs; flexes, laterally flexes, or rotates vertebral column to the same side

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24
Q

Transversus abdominus

A

O: cartilages of ribs 7-12, iliac crest, and thoracolumbar fossa
I: linea alba and pubis
A: compresses abdomen

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25
Coracobrachialis
O: corocoid process I: medial margin of shaft of humerus A: adduction and flexion at shoulder
26
Deltoid
O: clavicle and scapula (acromion and adjacent scapular spine) I: deltoid tuberosity of humerus A: whole muscle: abduction of shoulder; anterior part: flexion and medial rotation of humerus; posterior part: extension and lateral rotation of humerus N: axillary nerve
27
Supraspinatus
O: supraspinous fossa of scapula I: greater tubercle of humerus A: abduction at shoulder N: suprascapular nerve
28
Infraspinatus
O: infraspinous fossa of scapula I: greater tubercle of humerus A: lateral rotation at shoulder
29
Subscapularis
O: subscapular fossa of scapula I: lesser tubercle of humerus A: medial rotation at shoulder
30
Teres major
O: inferior angle of scapula I: medial lip of intertubercular sulcus of humerus A: extension and medial rotation at shoulder
31
Teres minor
O: lateral border of scapula I: greater tubercle of humerus A: lateral rotation and adduction at shoulder
32
Latissimus dorsi
O: spinous processes of inferior thoracic and all lumbar sacral vertebrae, ribs 8-12, and thoracolumbar fascia I: floor of intertubercular sulcus of the humerus A: extension, adduction, and medial rotation at shoulder
33
Pectoralis major
O: cartilages of ribs 2-6, body of sternum, and inferior, medial portion of clavicle I: crest of greater tubercle and lateral lip of intertubercular sulcus of humerus A: flexion, adduction, and medial rotation at shoulder
34
Biceps brachii
O: short head from the coracoid process; long head from the supraglenoid tubercle (scapula) I: radial tuberosity A: flexion at elbow and shoulder; supination N: musculocutaneous nerve
35
Brachialis
O: distal half of the anterior surface of the humerus I: ulnar tuberosity and coronoid process A: flexion at elbow
36
Brachioradialis
O: ridge superior to the lateral epicondyle of humerus I: lateral aspect of styloid process of radius A: flexion at elbow
37
Anconeus
O: posterior surface of lateral epicondyle of humerus I: lateral margin of olecranon and ulnar shaft A: extension at elbow
38
Triceps brachii (lateral head)
O: superior, lateral margin of humerus I: olecranon of unla A: extension at elbow N: radial nerve
39
Triceps brachii (long head)
O: infraglenoid tubercle of scapula I: olecranon of unla A: extension at elbow and extension and adduction at shoulder N: radial nerve
40
Triceps brachii (medial head)
O: posterior surface of humerus;, inferior to radial groove I: olecranon of unla A: extension at elbow N: radial nerve
41
Pronator teres
O: medial epicondyle of humerus and coronoid process of ulna I: middle of lateral surface of radius A: pronates forearm and hand by medial rotation of radius at radiounlar joints and flexion at elbow
42
Supinator
O: lateral epicondyle of humerus and ridge near radial notch of unla I: anterolateral surface of radius distal to the radial tuberosity A: supinates forearm and hand by lateral rotation of radius at radioulnar joints
43
Flexor carpi radialis
O: medial epicondyle of humerus I: bases of second and third metacarpal bones A: flexion and abduction at wrist
44
Flexor carpi ulnaris
O: medial epicondyle of humerus; adjacent medial surface of olecranon and anteromedial portion of the ulna I: pisiform, hamate, and base of fifth metacarpal bone A: flexion and adduction at wrist N: ulnar nerve
45
Palmaris longus
O: medial epicondyle of humerus I: palmar epineurosis and flexor retinaculum A: flexion at wrist
46
Extensor carpi radialis longus
O: lateral supracondylar ridge of humerus I: base of second metacarpal bone A: extension and abduction at wrist N: radial nerve
47
Extensor carpi radialis brevis
O: lateral epicondyle of humerus I: base of third metacarpal bone A: extension and abduction at wrist
48
Extensor carpi ulnaris
O: lateral epicondyle of humerus; adjacent dorsal surface of ulna I: base of fifth metacarpal bone A: extension and adduction at wrist
49
Extensor digitorum
O: lateral epicondyle of humerus I: posterior surfaces of the phalanges, digits 2-5 A: extension at finger joints and wrist
50
Flexor digitorum superficialis
O: medial epicondyle of humerus; coronoid process of ulna and adjacent anterior surfaces of ulna and radius I: to bases of middle phalanges of digits 2-5 A: flexion at proximal interphalangeal, metacarpophalangeal, and wrist joints N: medial nerve
51
Flexor digitorum profundus
O: medial and posterior surfaces of ulna, medial surfaces of coronoid process, and interosseous membrane I: bases of distal phalanges of digits 2-5 A: flexion at distal interphalangeal joints, and, to a lesser degree, proximal interphalangeal joints and wrist
52
Flexor pollicis longus
O: anterior shaft of radius, interosseous membrane I: base of distal phalanx of thumb A: flexion at joints of thumb
53
Gluteus maximus
O: iliac crest, posterior gluteal line, and lateral surface of ilium; sacrum, coccyx, and thoracolumbar fascia I: iliotibial tract and gluteal tuberosity of femur A: extension and lateral rotation at hip; helps stabilize the extended knee; abduction at the hip (superior fibers only) N: inferior gluteal nerve
54
Gluteus medius
O: anterior iliac crest, lateral surface of ilium b/w posterior and anterior gluteal lines I: greater trochanter of femur A: abduction and medial rotation at hip
55
Gluteus minimus
O: lateral surface of ilium b/w inferior and anterior gluteal lines I: greater trochanter of femur A: abduction and medial rotation at hip
56
Tensor fasciae latae
O: iliac crest and lateral surface of anterior superior iliac spine I: iliotibial tract A: abduction and medial rotation at hip; extension and lateral rotation at knee; tenses fasciae latae, which laterally supports the knee
57
Piriformis
O: anterolateral surface of sacrum I: greater trochanter of femur A: lateral rotation and abduction of hip; help to maintain stability and integrity of the hip
58
Quadratus femoris
O: lateral border of ischial tuberosity I: intertrochanteric crest of femur A: lateral rotation of hip
59
Adductor longus
O: inferior ramus of pubis, anterior to adductor brevis I: linea aspera of femur A: adduction, flexion, and medial rotation at hip
60
Adductor magnus
O: inferior ramus of pubis posterior to adductor brevis and ishial tuberosity I: linea aspera and adductor tubercle of femur A: whole muscle produces adduction at the hip; anterior part produces flexion and medial rotation; posterior part produces extension
61
Gracilis
O: inferior ramus of pubis I: medial surface of tibia inferior to medial condyle A: flexion and medial rotation at knee; adduction and medial rotation at hip N: obturator nerve
62
Biceps femoris
O: ishial tuberosity and linea aspera of femur I: head of fibula, lateral condyle of tibia A: flexion at knee; extension and lateral rotation at hip
63
Semimembranosus
O: ishial tuberosity I: posterior surface of medial condyle of tibia A: flexion at knee; extension and medial rotation at hip N: sciatic nerve
64
Semitendinosus
O: ishial tuberosity I: proximal medial surface of tibia near insertion of gracilis A: flexion at knee; extension and medial rotation at hip
65
Sartorius
O: anterior superior iliac spine I: medial surface of tibia near tibial tuberosity A: flexion at knee; abduction, flexion, and lateral rotation at hip N: femoral nerve
66
Popliteus
O: lateral condyle of femur I: posterior surface of proximal tibial shaft A: medial rotation of tibia (or lateral rotation of femur) at knee; flexion at knee
67
Rectus femorus
O: anterior inferior iliac spine and superior acetular rim of ilium I: tibial tuberosity via quadriceps tendon, patella, and patellar ligament A: extension at knee; flexion at hip N: femoral nerve
68
Vastus intermedius
O: anterolateral surface of femur and linea aspera (distal half) I: tibial tuberosity via quadriceps tendon, patella, and patellar ligament A: extension at knee N: femoral nerve
69
Vastus lateralis
O: anterior and inferior to greater trochanter of femur and along linea aspera (proximal half) I: tibial tuberosity via quadriceps tendon, patella, and patellar ligament A: extension at knee
70
Vastus medialis
O: entire length of linea aspera of femur I: tibial tuberosity via quadriceps tendon, patella, and patellar ligament A: extension at knee
71
Tibialis anterior
O: lateral condyle and proximal shaft of tibia I: base of first metatarsal bone and medial cuneiform A: dorsiflexion at ankle; inversion of foot
72
Gastrocnemius
O: femoral condyles I: calcaneus via calcaneal tendon A: plantar flexion at ankle; flexion at knee N: tibial nerve
73
Fibularis brevis
O: midlateral margin of fibular I: base of fifth metatarsal bone A: eversion of foot and plantar flexion at ankle
74
Fibularis longus
O: head and proximal shaft of fibula I: base of first metatarsal bone and medial cuneiform A: eversion of foot and plantar flexion at ankle; supports ankle; supports longitudinal and transverse arches
75
Soleus
O: head and [roximal shaft of fibula, and adjacent posteromedial shaft of tibia I: calcaneus via calcaneal tendon (with gastrocnemius) A: plantar flexion at ankle; postural muscle when standing
76
Tibialis posterior
O: interosseous membrane and adjacent shafts of tibia and fibula I: navicular, all three cuneiforms, cuboid, second, third, and fourth metatarsal bones A: inversion of foot; plantar flexion at ankle

Anatomy (6 decks)

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