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A&P Lab > Lab 7 > Flashcards

Lab 7 Flashcards

1
Q

Iliopsoas- Iliacus and psoas major

A

Origin: iliacus- iliac fossa and crest, lateral sacrum. Psoas major- transverse process, bodies, and discs of T12 and lumbar vertebrae
Insertion: on or just below lesser trochanter of femur
Action: Flex trunk at hip joint, flex thigh, lateral flextion of vertebral column

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2
Q

Sartorius

A

Origin: Anterior superior iliac spine
Insertion: by an aproneurosis into medial aspect of proximal tibia
Action: flex, abduct, and laterally rotate thigh, flex leg

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3
Q

Adductors (Magnus, longus, and brevis)

A

Origin: Magnus- ischial and pubic rami and ischial tuberosity. Longus- pubis near pubic symphysis. Brevis- body and inferior pubic ramus
Insertion: Magnus- linea aspera and adductor tubercle of femur. Longus & brevis- Linea aspera
Action: adducts and medially rotate and flex thigh

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4
Q

Pectineus

A

Origin: pectineal line of pubis (and superior pubic ramus)
Insertion: inferior from lesser trochanter to linea aspera of femur
Action: adducts, flexes, and medially rotates thigh

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5
Q

Gracilis

A

Origin: inferior ramus and body of pubis
Insertion: medial surface of tibia just inferior to medial condyle
Action: adducts thigh, flexes and medially rotates leg

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6
Q

Rectus Femoris (Quadriceps femoris)

A

Origin: anterior inferior iliac spine and superior margin of acetabulum
Insertion: tibial tuberosity and patella
Action: extend leg and flex thigh

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7
Q

Vastus lateralis (Quadriceps femoris)

A

Origin: greater trochanter, intertrochanteric line, and linea aspera
Insertion: tibial tuberosity and patella
Action: extends leg and stabilize knee

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8
Q

Vastus medialis (Quadriceps femoris)

A

Origin: linea aspera and intertrochanteric line
Insertion: tibial tuberosity and patella
Action: extend leg and stabilize patella

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9
Q

Vastus intermedius (Quadriceps femoris)

A

Origin: anterior and lateral surface of femur
Insertion: tibial tuberosity and patella
Action: extend leg

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10
Q

Tensor fascia lata

A

Origin: anterior aspect of iliac crest, and anterior superior iliac spine
Insertion: illiotibial tract (lateral fascia lata)
Action: steadies trunk

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11
Q

Gluteus Maximus

A

Origin: dorsal ilium, sacrum, and coccyx
Insertion: gluteal tuberosity of femur and iliotibial tract
Action: powerful thigh extensor

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12
Q

Gluteus medius

A

Origin: upper lateral surface of ilium
Insertion: greater trochanter of femur
Action: Abducts and medially rotates thigh

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13
Q

Gluteus minimus

A

Origin: external inferior surface of ilium
Insertion: greater trochanter of femur
Action: abducts and medially rotates thigh

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14
Q

Piriformis

A

Origin: anterior sacrum, gluteal surface of ilium
Insertion: greater trochanter of femur
Action: laterally rotates thigh, thigh abduction

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15
Q

Superior Gemellus

A

Origin: ischial spine
Insertion: medial surface of greater trochanter of femur
Action: laterally rotates thigh, thigh abduction

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16
Q

Obturator internus

A

Origin: inner surface of the obturator membrane, bony boundaries of obturator foramen
Insertion: medially surface of greater trochanter of femur
Action: laterally rotates thigh, abduction of flexed thigh

17
Q

Inferior Gemellus

A

Origin: ischial tuberosity
Insertion: medial surface of greater trochanter of femur
Action: laterally rotates thigh, thigh abduction

18
Q

Quadratus femoris

A

Origin: ischial tuberosity
Insertion: intertrochanteric crest of femur
Action: laterally rotates thigh

19
Q

Biceps femoris (hamstring)

A

Origin: long head- ischial tuberosity, short head- linea aspera and distal femur
Insertion: tendon passes laterally to insert into head of fibula and lateral condyle of tibia
Action: extend thigh, flex leg

20
Q

Semitendinosus (hamstring)

A

Origin: ischial tuberosity
Insertion: medial aspect of upper tibial shaft
Action: extend thigh, flex leg

21
Q

Semimembranosus (hamstring)

A

Origin: ischial tuberosity
Insertion: medial condyle of tibia, lateral condyle of femur
Action: extend thigh, flex leg

22
Q

Fibularis (peroneus) longus

A

Origin: head and upper portion of fibula
Insertion: by long tendon under foot to metatarsal 1 and medial cuneiform
Action: plantar flexes and everts foot

23
Q

Fibularis (peroneus) brevis

A

Origin: distal portion of fibula shaft
Insertion: by tendon running behind lateral malleolus to insert on proximal end of metatarsal 5
Action: plantar flexes and everts foot

24
Q

Tibialis anterior

A

Origin: lateral condyle and upper 2/3 of tibia, interosseous membrane
Insertion: by tendon into inferior surface of first cuneiform and metatarsal 1
Action: prime mover of dorsiflexion

25
Q

Extensor digitorum longus

A

Origin: lateral condyle of tibia, proximal 3/4 of fibula, interosseous membrane
Insertion: tendon divides into 4 parts, inserts into middle and distal phalanges of toes 2-5
Action: prime mover of toe extension

26
Q

Fibularis (peroneus) tertius

A

Origin: Distal anterior surface of fibula and interosseous membrane
Insertion: Tendon inserts on dorsum of metatarsal 5
Action: Dorsiflexes and everts foot

27
Q

Extensor hallucis longus

A

Origin: Anteriomedial shaft of fibula and interosseous membrane
Insertion: Tendon inserts on distal phalanx of great toe
Action: Extends great toe

28
Q

Gastrocnemius (Triceps surae)

A

Origin: By two heads from medial and lateral condyles of femur
Insertion: calcaneus via calcaneal tendon
Action: plantar flexes foot

29
Q

Soleus (Triceps surae)

A

Origin: Proximal portion of tibia and fibula, interosseous membrane
Insertion: calcaneus via calcaneal tendon
Action: plantar flexion

30
Q

Popliteus

A

Origin: Lateral condyle of femur and lateral meniscus
Insertion: proximal tibia
Action: Flexes and rotates leg medially to unlock the knee when leg flexion begins

31
Q

Tibialis posterior

A

Origin: superior portion of tibia and fibula, interosseous membrane
Insertion: tendon passes obliquely behind medial malleoulus and under arch of foot, inserts into several tarsals and metatarsals 2-4
Action: prime mover of foot inversion

32
Q

Flexor digitorum longus

A

Origin: posterior surface of tibia
Insertion: distal phalanges of toes 2-5
Action: Flexes toes, plantar flexes and inverts foot

33
Q

Flexor hallucis longus

A

Origin: middle portion of fibula shaft, interosseous membrane
Insertion: tendon runs under foot to distal phalanx of great toe
Action: Flexes great toe, plantar flexes and inverts foot

34
Q

What is EMG

A

electromyogrphy; the electrical signal recorded from a contracting muscle. Depicts the timing and pattern of muscle activity during complex movements.

35
Q

Why is EMG waveform irregular and electrocardiogram is discrete?

A

EMG measures muscular activity which is not as steady of a rhythm as pulse

36
Q

What happens to biceps EMG when weight is added

A

Baseline fro the RMS went up and EMG signal increased

37
Q

Coactivation

A

The antagonist muscle is activated when the agonist is working. Thought to stabilize the joint

38
Q

What happens to triceps EMG when bicep is activated

A

It also spiked (not quite as much) which is evidence of coactivation

A&P Lab (8 decks)

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