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MSK I > Anterior and Medial Thigh Lecture > Flashcards

Anterior and Medial Thigh Lecture Flashcards

1
Q

Lateral cutaneous branch of subcostal n.

A

T12 dermatome map area 1 on leg

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2
Q

Sciatic Nerve and it’s two branches

A

SN: L4-S3

  • Tibial Nerve L4-S3
  • Common fibular nerve L4-S2
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3
Q

Patellar Reflex

A

tests function of the femoral nerve and spinal cord segments L2-L4

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4
Q

Westphal’s sign

A

problems with femoral nerve and spinal roots L2-L4: failure of reflex in patellar tendon

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5
Q

Calcaneal Tendon Reflex

A

Tendon reflex tests S1 and S2 nerve roots

if nerve root is cut or compressed, ankle reflex is virtually absent

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6
Q

L2, L3, L4 —> what reflex, what problem

S1 and S2 —> what reflex, what problem

A

L2,3,4 = Patellar tendon test, problems here are Wesphal’s sign

S1 and S2 = calcaneal tendon reflex

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7
Q

What reflex would be diminished in a pinched nerve between S1 and S2?

A

ankle reflex

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8
Q

Muscles of the anterior thigh

A

Iliopsoas
Pectineus
Sartoris
Quadricepts femoris

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9
Q

Iliopsoas m

A

chief flexor of the thigh

consists of iliacus (femoral nerve)
psoas major (L1-L3) ventral rami
psoas minor (L1-L2) ventral rami
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10
Q

Psoas major

A

L1-L3 ventral rami

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11
Q

Psoas minor

A

L1-L2 ventral rami

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12
Q

Iliacus

A

Femoral nerve (L2-L4)

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13
Q

What is the insertion point for the iliopsoas?

A

under the trochanter of the neck of the femur

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14
Q

Sartorius m.

A

longest muscle in the body

most superficial

femoral nerve

flex, abducts, laterally rotates thigh

flexes hip

(ASIS – pes anserinus) on medial aspect of tibia with semitendinosus and gracilis

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15
Q

Pes Anserinus

A

common insertion for three muscles innervated by three separate nerves

sartorius tendon

gracilis tendon

semitendinosus tendon

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16
Q

Quadriceps femoris

A

CHIEF EXTENSOR of the leg

consists of vastus lateralis, vastus intermedius, vastus medialus, rectus femoris

femoral nerve

functions: vasti extend leg, rectus extend leg and flexes thigh

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17
Q

Vasti ____ leg; rectus _____

A

Vasti extend leg

rectus extend leg and flex thigh

18
Q

Anterior to posterior (front to back) what order is pes anserinus

A

Sartorius tendon – Gracilis — Semitendinosus

19
Q

quadraceps femoris is the

A

great extensor of the thigh

quadracepts tendon insets on tibial tuberosity

20
Q

vastus lateralis origin – insertion

A

greater trochanter —> tibial tuberosity

21
Q

vastus medialis origin – insertion

A

intertrochanteric line –> tibial tuberosity

22
Q

vastus intermedius origin – insertion

A

anterior/inferior aspects of femur itself, but contributes to the tibial insertion as well

23
Q

Tendons of all four muscles of quadriceps femoris —>

A

continues inferiorly as patellar ligament

24
Q

Functions of quadricep femoris

A

chief extensor of thigh, rectus also flexes thigh

25
Q

which is the only quadricep muscle that does not have its origins on the femur?

A

rectus femoris, origin on anterior inferior iliac spine

26
Q

Medial Thigh Muscles are (kind of motion they control)

A

adductors: superficially

27
Q

SUPERFICIAL Medial thigh muscles include

A

Pectineus, adductor longus, adductor brevis, gracilis

28
Q

DEEP medial thigh muscles include

A

Obturator externus, adductor magnus (adductor portion), adductor magnus (hamstring portion)

29
Q

insertions/origins of adductor magnus

A

origin: ischiopubic ramus
insertions: gluteal tuberosity, linea aspera, medial supracondylar line, adductor tubercle (insertion)

30
Q

Pectineus m.: attachments, innervation, function

A 
Pectin line of pubis (origin)
pectineal line (insertion), and just inferior to lesser trochanter

innervation: femoral nerve. occasionally obturator
functions: ADDUCT and FLEX thigh

31
Q

Adductor longus m.: attachments, innervation, function

A

body of pubis (inferior to pubic crest), middle 1/3 of linea aspera

innervation obturator nerve (L2-L4)

function: adducts and flexes thigh

32
Q

Gracilis muscle: attachments, innervation, function

A

long strap like muscle. ONLY ADDUCTOR TO CROSS KNEE

attachments: pubis body, and inferior ramus
superior part of medial surface of tibia (part of pes anserinus)

obturator nerve

functions: adducts thigh, flex and medially rotates leg

33
Q

adductor brevis m.

A

lies deep to pectineus and adductor longus

attachments: pubis body and inferior ramus AND proximal linea aspera
innervated: obturator nerve
functions: adducts and flexes thigh

34
Q

Groin pull

A

junction between trunk and thigh has been pulled

strain/stretching, probably some rearing of the proximal attachments of thich adductor/flexor muscles

35
Q

Obturator externus

A

deep to pectineus

attachments: external margins of obturator foramen
trochanteric fossa

innervation: obturator nerve

36
Q

Adductor Magnus: where, size, composition

A

Adductor part origin: ischiopubic ramus
Hamstring part origin: Ischial tuberosity

Largest adductor, deep to adductor brevis

has a hamstring and an adductor portion

37
Q

Adductor magnus: hamstring portion

A

origin on ischial tuberosity

distally: gluteal tuberosity, linea aspera

38
Q

Medial compartment muscles: function/innervation

A

adduction and obturator nerve

39
Q

Anterior compartment muscles: function/innervation

A

femoral nerve, extension

40
Q

Posterior compartment muscles: function/innervation

A

Flexion, Sciatic nerve

41
Q

Hilton’s Law

A

a joint is innervated by the very same nerves that supply the muscle that move the joint and supply the skin over the joint

MSK I (14 decks)

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