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Anatomy > Muscle innervations, blood supply > Flashcards

Muscle innervations, blood supply Flashcards

1
Q

Psoas major

A

Action: Chief flexor of thigh

Innervation:L1-L3 ventral rami

Blood Supply:subcostal a., lumbar aa.

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2
Q

Psoas minor

A

Action: Chief flexor of thigh

Innervation:L1-L2 ventral rami

Blood Supply:subcostal a., lumbar aa.

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3
Q

Sartorius

A

Action: Flex, abduct, laterally rotate thigh, flex leg

Innervation:Femoral n.

Blood Supply:Lateral circumflex femoral a., saphenous a.

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4
Q

Gracilis

A

Action: Adduct thigh, flex/medially rotate leg

Innervation:Obturator n.

Blood Supply:obturator a.

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5
Q

Semitendinosus

A

Action: Extend thigh, flex leg

Innervation:Tibial n.

Blood Supply:Perforating branches of deep femoral a.

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6
Q

Quadriceps femoris

A

Action: Leg extension, flexion of thigh (rectus femoris only)

Innervation:Femoral n.

Blood Supply:Lateral circumflex femoral a., deep femoral a.

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7
Q

Pectineus

A

Action: Adduct and flex thigh

Innervation:Femoral n. (occasionally a branch from obturator n.)

Blood Supply: Medial circumflex femoral a.

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8
Q

Adductor longus

A

Action: Adducts and flexes thigh

Innervation:Obturator nerve (L2-L4)

Blood Supply:Obturator a., deep femoral a.

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9
Q

Adductor brevis

A

Action: Adducts and flexes thigh

Innervation:Obturator n.

Blood Supply:Obturator a., deep femoral a.

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10
Q

Adductor Magnus

A

Action: Largest adductor muscle. (adductor part-adducts, flexes thigh…hamstring part: adducts and extends thigh)

Innervation: Posterior division of obturator n. (adductor part), tibial n. (hamstring part-tibial division of sciatic nerve)

Blood Supply:obturator a., deep femoral a., medial circumflex femoral a.

Origin: Pubis, ischium
**Insertion: Adductor tubercle

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11
Q

Obturator externus

A

Action: Laterally rotates thigh

Innervation: Obturator n.

Blood Supply:obturator a.

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12
Q

Tibialis anterior

A

Action: Dorsiflexion, invert foot

Innervation: Deep fibular (peroneal) n.

Blood Supply:anterior tibial a.

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13
Q

Tibialis posterior

A

Action: Plantar flexion, invert foot

Innervation: tibial n.

Blood Supply:fibular (peroneal) a., tibial a.

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14
Q

Extensor digitorum longus

A

Action: Extends lateral 4 digits, dorsiflexion

Innervation: Deep fibular (peroneal) n.

Blood Supply:Anterior tibial a.

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15
Q

Fibularis Tertius

A

Action: Dorsiflexion, Eversion. (unique b/c it’s on anterior side and other ‘fibularis’ muscles are on posterior side)

Innervation: Deep fibular n.

Blood Supply:Anterior tibial a.

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16
Q

Extensor hallucis longus

A

Action: Extend hallux, dorsiflex ankle

Innervation: Deep fibular n.

Blood Supply:anterior tibial a.

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17
Q

Fibularis longus

A

Action: Eversion and plantar flexion

Innervation: Superficial fibular n.

Blood Supply:Fibular a.

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18
Q

Fibularis brevis

A

Action: Eversion, plantar flexion

Innervation: Superficial fibular n.

Blood Supply:Fibular a.

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19
Q

Ischiofemoral ligament does what?

A

Strengthens joint capsule posteriorly

Helps prevent over-extension

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20
Q

Iliofemoral ligament does what?

A

Upside down “Y” on anterior aspect of hip

Helps prevent overextension

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21
Q

Pubofemoral ligament does what?

A

Helps prevent overabduction and overextension

22
Q

Round femoral head ligament does what?

A

Function may be to assist in spreading synovial fluid

23
Q

Gastrocnemius

A

Action: Plantar flexion and flexes leg

Innervation: Tibial n.

Blood Supply: sural aa., posterior tibial a.

24
Q

Soleus

A

Action: Plantarflexion

Innervation:Tibial n

Blood Supply: Posterior tibial a.

25
Q

Plantaris

A

Action: Weak plantar flexion and leg flexion

Innervation:Tibial n.

Blood Supply:Popliteal a.

26
Q

Popliteus

A

Action: Flexes and rotates leg medially (with foot planted, it rotates the thigh laterally)

Innervation: Tibial n.

Blood Supply:Popliteal a.

27
Q

Flexor hallucis longus

A

Action: Flexes great toe. Plantar flexes foot. Powerful muscle for “push-off” of foot during walking

Innervation: Tibial n.

Blood Supply: Fibular a., tibial a.

28
Q

Flexor digitorum longus

A

Action: Flexes lateral four digits, plantar flex foot

Innervation: Tibial n.

Blood Supply: Tibial a.

29
Q

Piriformis

A

Action: Laterally rotates and abducts thigh

Innervation: Ventral rami of L5, S1-S2

Blood Supply:Superior and inferior gluteal and internal pudendal aa.

(leaves pelvis by passing through greater sciatic foramen)

30
Q

Gluteus maximus

A

Action: Chief extensor of hip, lateral rotation of femur

Innervation: Inferior gluteal n.

Blood Supply: superior and inferior gluteal aa.

31
Q

Gluteus Medius and Minimus

A

Action: Abducts femur, medially rotates the thigh

Innervation: Superior gluteal n.

Blood Supply: Superior gluteal a.

32
Q

Tensor fasciae latae

A

Action: Flexes, abducts, and medially rotates thigh

Innervation: Superior gluteal n.

Blood Supply: Superior gluteal a.

33
Q

What does IT band do?

A

(Part of fascia latae)

Assists in decelerating adduction of thigh, laterally stabilizes knee, extends leg, compensate for quadriceps

34
Q

Obturator internus

A

Action: Laterally rotates and abducts thigh

Innervation: Nerve to the obturator internus m.

Blood Supply: Obturator a.

35
Q

Superior gemellus

A

Action: Laterally rotates femur

Innervation: Nerve to the obturator internus m.

Blood Supply: inferior gluteal a.

36
Q

Semimembranosus

A

Action: Extends thigh, flexes leg

Innervation: Tibial n.

Blood Supply: Perforating branches of deep femoral a.

37
Q

What does the Oblique popliteal ligament do?

A

Reinforces intercondylar part of joint capsule of knee

38
Q

Biceps femoris

A

Action: Extends thigh, flexes leg

Innervation: Long head→tibial n.
Short head→common fibular n.

Blood Supply: perforating branches of the deep femoral a.

39
Q

Extensor hallucis brevis

A

Action: Extends great toe

Innervation: Deep fibular n.

Blood Supply: Dorsalis pedis a.

40
Q

Extensor digitorum brevis

A

Action: Extends toes 1-4

Innervation: Deep fibular n.

Blood Supply: Dorsalis pedis a.

41
Q

Quadratus plantae

A

Action: Assists flexor digitorum longus in flexing toes

Innervation: Lateral plantar n.

Blood Supply: Lateral plantar a.

42
Q

Lumbrical (foot)

A

Action: Flex foot joints, extend proximal and distal interphalangeal joints of digits 2-5

Innervation: Medial plantar n. (1st lumbrical)…..Lateral plantar n. (3 other lumbricals)

Blood Supply: Superficial palmar arterial arch/ Medial & Lateral plantar aa.

43
Q

Flexor digiti minimi brevis (foot)

A

Action: Flexes joint of 5th digit

Innervation: Lateral plantar n.

Blood Supply: lateral plantar a.

44
Q

Adductor hallucis

A

Action: Adducts great toe

Innervation: Deep branch of lateral plantar n.

Blood Supply: plantar arterial arch

45
Q

Flexor digitorum brevis (foot)

A

Action: Flexes joints of digits 2-5

Innervation: Medial plantar n.

Blood Supply: Medial and lateral plantar aa.

46
Q

Abductor digiti minimi (foot)

A

Action: Abducts 5th digit

Innervation: Lateral plantar n.

Blood Supply: Lateral plantar a.

47
Q

Abductor hallucis

A

Action: Abducts great toe

Innervation: Medial plantar n.

Blood Supply: Medial plantar a.

48
Q

Trapezius

A

Action: Elevates, depresses, retracts scapula. Upward rotation of glenoid.

Innervation: Assessory nerve (CN11), sensory (proprioception) C3-C4

Blood Supply: Transverse cervical a.

49
Q

Latissimus dorsi

A

Action: Extends, adducts, medially rotates humerus. Raises torso towards arms when climbing (pull-ups). Lat-pull-downs

Innervation: Thoracodorsal nerve (C6-C8)

Blood Supply: Thoracodorsal a.

50
Q

Levator scapulae

A

Action: Elevate scapula, tilts glenoid fossa down by rotating the scapula down

Innervation: Dorsal scapular nerve (C5), Cervical spinal nerves (C3-C4)

Blood Supply: Dorsal scapular a.

51
Q

Rhomboid major and minor

A

Action: Retract, elevate and rotate scapula downward, also fix scapula to thoracic wall

Innervation: Dorsal scapular nerve (C4-C5)

Blood Supply: Dorsal scapular a.

52
Q

Inferior gemellus

A

Action: Laterally rotates femur

Innervation: Nerve to the quadratus femoris m.

Blood Supply: Inferior gluteal a.

Anatomy (22 decks)

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