Gluteal Flashcards

1
Q

Glute borders

A

The gluteal region lies posterior to the pelvis and is bounded superiorly by the iliac crests and inferiorly by the gluteal sulcus created by the Gluteus Maximus muscles.

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2
Q

Label the X ray of pelvis

A

Lecture Slide

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3
Q

Glute ligaments

A
  1. Sacrotuberous ligament is continuous with the posterior sacroiliac ligament. It extends across the sciatic notch and along with the

2.sacrospinous ligament, converts the notch into Greater and Lesser Sciatic Foramina.

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4
Q

Label the areas of pelvis (no ligaments)

A

Lecture Slide

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5
Q

Label pelvis with ligaments

A

Lecture Slide

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6
Q

Gluteal Muscles:
*Gluteus Maximus
*Gluteus Medius
*Gluteus Minimus
Piriformis
Obturator internus
Superior and inferior gemelli
Quadratus femoris
*Tensor fascia lata

  • origin
    -insertion
    -action
    -Nerve supply
A

Lecture Slide

*Gluteus Maximus
Origin:
Upper portion of ilium, posterior sacrum, coccyx, sacrotuberous lig

Insertion:
ITB, gluteal tuberosity of femur

Action:
Extends and
laterally rotates thigh
Extends hip

Nerve Supply
Inferior Gluteal L5,S1,S2

*Gluteus Medius
Origin: Ilium between posterior and middle gluteal lines

Insertion: Greater trochanter

Action: Abducts and internally rotates thigh, steadies pelvis when walking

Nerve Supply
Superior Gluteal L4-S1 and artery

*Gluteus Minimus
Origin: Ilium between middle and inferior gluteal lines

Insertion: Greater trochanter

Action:’Abducts and internally rotates thigh, stabilise pelvis when walking

Nerve Supply
Superior Gluteal L4-S1 and artery

Tensor fascia lata
Origin: ASIS, iliac crest
Insertion: ITB
Action: Abducts thigh, dynamic stabilizer. When raising leg to take a step, weight of body shifts to standing leg. To prevent pelvis tilting to side of raised leg the opposite side abductors need to be very powerful
Nerve Supply
Superior Gluteal L4-S1

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7
Q

Label where abductors and extensors and rotators are

A

Lecture Slide

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8
Q

Label where all muscles are on glute

A

Lecture Slide

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9
Q

Posterior Thigh Muscles:
Label diagram

A

Lecture Slide

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10
Q

Muscles of Posterior Thigh Muscles:

*Biceps femoris
*Semitendinosus
*Semimembranous
Adductor magnus

-origin
-insertion
-action
-nerve supply

A

LEcture Slide

*Biceps femoris
Origin
Long Head: ischial tuberosity Short Head: linea aspera

Insertion
Head of fibula

Action
Flexes and externally rotates leg at knee; extends thigh at hip

Nerve supply
Sciatic
Long Head: Tibial
Short Head: Peroneal (L5, S1)

*Semitendinosus
Origin: Ischial tuberosity

Insertion
Superior part of medial tibia
(Pes Anserinus)

Action
Flexes and internally rotates leg; extends thigh/hip

Nerve supply
Sciatic (Tibial L5, S1, S2)

*Semimembranous
Origin: Ischial tuberosity

Insertion
Medial condyle of tibia

Action
Flexes and internallyrotates leg; extends thigh/hip

Nerve supply
Sciatic (Tibial L5, S1, S2)

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11
Q

Nerves and Vessels of the Gluteal Region
describe the flow and label diagram

A

The gluteal arteries arise from the Internal Iliac Arteries.

The Superior Gluteal and Inferior Gluteal arteries leave the pelvis through the Greater Sciatic Foramen and, along with their corresponding nerves, pass superior and inferior to Piriformis.

The Internal Pudendal Artery also leaves the pelvis via the Greater Sciatic Foramen, but then hooks around the Ischial spine to enter the pelvis via the Lesser Sciatic Foramen.

The Superior and Inferior Gluteal Arteries anastomose then further anastomose with the circumflex arteries (branches of the Profunda Femoris).

Lecture Slide

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12
Q

Sciatic nerve
-size
-continuation of
-divides into

A

The Sciatic Nerve is the largest nerve in body and is a continuation of main part of sacral plexus.

It exits under the gluteal region under Gluteus Maximus, inferior to Piriformis.

It is large enough to have own artery- a branch of the Inferior Gluteal- called the artery to Sciatic Nerve.

The Sciatic Nerve divides into Tibial and Peroneal components

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13
Q

Tilt of bony pelvis and ASIS is in same plane as ?

A

The bony pelvis
is tilted upwards

ASIS is in same plane as symphysis pubis

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14
Q

Acetabulum:
At site of fusion of what 3 bones?
-how does it change as you age? and at what age for each sex does it fuse

A

illium, ischium and pubis

Initially cartilaige and then becomes bones and then fuse (Age 14 –for girls and Age 16 for boys)

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15
Q

Label the hip bone front and back (side profile)

A

Pelvis comprises of 2 hip bones (+ ischium, ilium, pubis) + the sacrum + coccyx

Lecture Slide

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16
Q

Where is the Sacrospinous ligament and Sacrotuberous ligament on diagram

A

Lecture Slide

17
Q

describe location of Sacrospinous ligament
- attaches to?

A

Located from the sacrum to the ischial spine

18
Q

describe location of Sacrotuberous ligament
- attaches to?
- continous with?
-converts notch into?

A

Located from The sacrum to the ischial tuberosity

Attaches to ischium spine to saccrum

Sacrotuberous ligament is continuous with the posterior sacroiliac ligament

*It extends across the sciatic notch and along with the sacrospinous ligament, converts the notch into Greater and Lesser Sciatic Foramina

19
Q

Greater and Lesser sciatic foramen
- Purpose
-Example

A

The Greater Sciatic Foramen
* Allows passage to all the lower limb arteries and nerves OUT from the pelvis and into the gluteal region e.g. Sciatic Nerve (7 nerves, 3 arteries, 1 muscle)

The Lesser Foramen
Is the passage way for structures entering or leaving the perineum. e.g. Pudendal Nerve

20
Q

what does externally rotating hip look like?

A

Point toes outward

21
Q

Nerves and Vessels of Gluteal region in relation to piriformis

A

Arteries and nerves arising above piriformis = superior gluteal A+N

Arteries and nerves arising below piriformis = inferior gluteal A+N

22
Q

Summary:
Nerves and what they supply to and their nerve supply

Nerves to gluteal region
Sup gluteal nerve
Inferior gluteal nerve
Post femoral cutaneous n
Sciatic N
Pudendal nerve

A
  • Nerves to gluteal region are from sacral plexus (L4-S4)
  • Sup gluteal nerve supplies gluteus medius and minimus
  • Inferior gluteal nerve supplies gluteus maximus
  • Other muscles have own nerves (quad femoris,
    obturator internus, piriformis)
  • Post femoral cutaneous n S1-3. supplies skin of lower buttock and post compartment of thigh
  • Sciatic N (L4,5,S1,2,3) has no branches in gluteal region
  • Pudendal nerve supplies perineal structures
23
Q

Arteries of the gluteal region
-superior and inferior flow

A

The gluteal arteries arise from the Internal Iliac arteries

The Superior and Inferior Gluteal arteries leave the pelvis through the Greater Sciatic Foramen and, along with their corresponding nerves, pass superior and inferior to Piriformis

24
Q

Gluteal Superior and inferior arteries anatomse with what

A

The Superior and Inferior Gluteal Arteries anastomose then further anastomose with the circumflex arteries (branches of the Profunda Femoris that supply femoral head)

25
Q

Clinical Applications: Hamstring injuries

A

Usually due to kicking or running sports.
Muscle sstrains or tears or can avulse the ischail tuberosity

26
Q

Where can you give injections in the butt?

A

With respect to the Sciatic nerve, the buttock has a ‘safe’ side; the lateral side.

The safe area to give these injections is therefore the superolateral part of the buttock.

27
Q

Trendelenburg gait
-caused by?
-affects of this?
-how to diagnose

A

Gluteus Medius has an important role in pelvic stabilization, particularly when walking

Injury to this muscle (or the the Superior Gluteal Nerve) results in a characteristic stance and gait pattern. Thigh abduction on the affected side is weakened and the resulting gait is referred to as a Gluteal or Trendenlenburg gait

Causes: Avulsion of insertion of gluteus medius

Diagnosis:
When a person with a non-functioning
Gluteus Medius stands on the affected leg, the pelvis will titl down on the unaffected
side (the ‘sound side sags’). As this person walks, to clear the leg on the unaffected side they must lean over to the side with the Glut Med insufficiency- giving the characteristic Trendelenburg gait.