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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
Plantaris
Action: Weak plantar flexion and leg flexion Innervation: Tibial n. Blood Supply: Popliteal a.
26
Popliteus
Action: Flexes and rotates leg medially (with foot planted, it rotates the thigh laterally) Innervation: Tibial n. Blood Supply: Popliteal a.
27
Flexor hallucis longus
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
Flexor digitorum longus
Action: Flexes lateral four digits, plantar flex foot Innervation: Tibial n.   Blood Supply: Tibial a.  
29
Piriformis
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
Gluteus maximus
Action: Chief extensor of hip, lateral rotation of femur Innervation: Inferior gluteal n. Blood Supply: superior and inferior gluteal aa.
31
Gluteus Medius and Minimus
Action: Abducts femur, medially rotates the thigh Innervation: Superior gluteal n. Blood Supply: Superior gluteal a.
32
Tensor fasciae latae
Action: Flexes, abducts, and medially rotates thigh Innervation: Superior gluteal n. Blood Supply: Superior gluteal a.
33
What does IT band do?
(Part of fascia latae) Assists in decelerating adduction of thigh, laterally stabilizes knee, extends leg, compensate for quadriceps
34
Obturator internus
Action: Laterally rotates and abducts thigh Innervation: Nerve to the obturator internus m. Blood Supply: Obturator a.
35
Superior gemellus
Action: Laterally rotates femur Innervation: Nerve to the obturator internus m. Blood Supply: inferior gluteal a.
36
Semimembranosus
Action: Extends thigh, flexes leg Innervation: Tibial n. Blood Supply: Perforating branches of deep femoral a.
37
What does the Oblique popliteal ligament do?
Reinforces intercondylar part of joint capsule of knee
38
Biceps femoris
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
Extensor hallucis brevis
Action: Extends great toe Innervation: Deep fibular n. Blood Supply: Dorsalis pedis a.
40
Extensor digitorum brevis
Action: Extends toes 1-4 Innervation: Deep fibular n. Blood Supply: Dorsalis pedis a.
41
Quadratus plantae
Action: Assists flexor digitorum longus in flexing toes Innervation: Lateral plantar n. Blood Supply: Lateral plantar a.
42
Lumbrical (foot)
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
Flexor digiti minimi brevis (foot)
Action: Flexes joint of 5th digit Innervation: Lateral plantar n. Blood Supply: lateral plantar a.
44
Adductor hallucis
Action: Adducts great toe Innervation: Deep branch of lateral plantar n. Blood Supply: plantar arterial arch
45
Flexor digitorum brevis (foot)
Action: Flexes joints of digits 2-5 Innervation: Medial plantar n. Blood Supply: Medial and lateral plantar aa.
46
Abductor digiti minimi (foot)
Action: Abducts 5th digit Innervation: Lateral plantar n. Blood Supply: Lateral plantar a.
47
Abductor hallucis
Action: Abducts great toe Innervation: Medial plantar n. Blood Supply: Medial plantar a.
48
Trapezius
Action: Elevates, depresses, retracts scapula. Upward rotation of glenoid. Innervation: Assessory nerve (CN11), sensory (proprioception) C3-C4 Blood Supply: Transverse cervical a.
49
Latissimus dorsi
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
Levator scapulae
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
Rhomboid major and minor
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
Inferior gemellus
Action: Laterally rotates femur Innervation: Nerve to the quadratus femoris m. Blood Supply: Inferior gluteal a.

Anatomy (22 decks)

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