Anatomy 2 Flashcards
Gluteal muscles and attachments
Gluteus maximus: inserts to gluteal tuberosity of the femur and iliotibial tract
Gluteus medius: attach to lateral greater trochanter
Gluteus minimis: attach to anterior greater trochanter
All extend and abduct the hip
Deep lateral hip rotators muscles
Deep lateral hip rotators Piriformis Gemelli Obturator internus Quadratus femoris
How does damage to superior gluteal nerve present?
Damage to the superior gluteal nerve will result in the patient developing a Trendelenberg gait. Affected patients are unable to abduct the thigh at the hip joint. During the stance phase, the weakened abductor muscles allow the pelvis to tilt down on the opposite side. To compensate, the trunk lurches to the weakened side to attempt to maintain a level pelvis throughout the gait cycle. The pelvis sags on the opposite side of the lesioned superior gluteal nerve.
Femoral nerve supply
Mnemonic for femoral nerve supply
(don’t) M I S V Q Scan for PE
M edial cutaneous nerve of the thigh
I ntermediate cutaneous nerve of the thigh
S aphenous nerve
V astus
Q uadriceps femoris
S artorius
PE ectineus
Path of femoral nerve
Penetrates psoas major and exits the pelvis by passing under the inguinal ligament to enter the femoral triangle, lateral to the femoral artery and vein.
Iliacus lies posterior to the femoral nerve in the femoral triangle
Position and relations of adrenal glands
Superomedially to the upper pole of each kidney
Relationships of the right adrenal
Diaphragm-Posteriorly,
Kidney-Inferiorly,
Vena Cava-Medially,
Hepato-renal pouch and bare area of the liver-Anteriorly
Relationships of the left adrenal
Crus of the diaphragm-Postero- medially,
Pancreas and splenic vessels-Inferiorly,
Lesser sac and stomach-Anteriorly
Arterial Supply of adrenals
superior adrenal arteries - from inferior phrenic
Middle adrenal arteries - from aorta,
Inferior adrenal arteries - from renal arteries
You are assisting in an open right adrenalectomy for a large adrenal adenoma. The consultant is distracted and you helpfully pull the adrenal into the wound to improve the view. Unfortunately this is followed by brisk bleeding. The vessel responsible for this is most likely to be:
Venous drainage of the right adrenal
Via one central vein directly into the IVC
Venous drainage of the left adrenal
Via one central vein into the left renal vein
Contents of the Axilla
1) Long thoracic nerve (of Bell)
Derived from C5-C7 and passes behind the brachial plexus to enter the axilla. It lies on the medial chest wall and supplies serratus anterior. Its location puts it at risk during axillary surgery and damage will lead to winging of the scapula.
2) Thoracodorsal nerve and thoracodorsal trunk Innervate and vascularise latissimus dorsi.
3)Axillary vein
Lies at the apex of the axilla, it is the continuation of the basilic vein. Becomes the subclavian vein at the outer border of the first rib.
4) Intercostobrachial nerves
Traverse the axillary lymph nodes and are often divided during axillary surgery. They provide cutaneous sensation to the axillary skin.
5) Lymph nodes
The axilla is the main site of lymphatic drainage for the breast.
Anal Lymph drainage
Mesorectal lymph nodes (superior to dentate line) Inguinal nodes (inferior to dentate line)
Spermatic cord Formed by the vas deferens and is covered by the following structures:
Internal Spermatic fascia - tranversalis fascia
Cremasteric fascia - from IO
External Spermatic fascia - From EO
Scrotum
Composed of skin and closely attached dartos fascia.
Arterial supply from the anterior and posterior scrotal arteries
Lymphatic drainage to the inguinal lymph nodes
Parietal layer of the tunica vaginalis is the innermost layer
Testes
Testes
The testes are surrounded by the tunica vaginalis (closed peritoneal sac). The parietal layer of the tunica vaginalis adjacent to the internal spermatic fascia.
The testicular arteries arise from the aorta immediately inferiorly to the renal arteries.
The pampiniform plexus drains into the testicular veins, the left drains into the left renal vein and the right into the inferior vena cava.
Lymphatic drainage is to the para-aortic nodes.
Contents of the spermatic cord
1) Vas deferens
Transmits sperm and accessory gland secretions
2) Testicular artery Branch of abdominal aorta supplies testis and epididymis
3) Artery of vas deferens Arises from inferior vesical artery
4) Cremasteric artery Arises from inferior epigastric artery
5) Pampiniform plexus Venous plexus, drains into right or left testicular vein
6) Sympathetic nerve fibres Lie on arteries, the parasympathetic fibres lie on the vas
7) Genital branch of the genitofemoral nerve Supplies cremaster
8) Lymphatic vessels Drain to lumbar and para-aortic nodes
Phrenic nerve course
The phrenic nerve descends on scalenus anterior posterolateral to the IJV and passing anterior to the cervical pleura and the second part of the subclavian artery, behind the subclavian vein.
The surgeons decide to perform a high ligation of the inferior mesenteric vein. Into which of the following does this structure usually drain?
The inferior mesenteric vein drains into the splenic vein, this point of union lies close to the duodenum and this surgical maneouvre is a recognised cause of ileus.
nodal stations of axilary node clearance?
During an axillary node clearance for breast cancer the clavipectoral fascia is incised and this allows access to the nodal stations. The nodal stations are; level 1 nodes inferior to pectoralis minor, level 2 lie behind it and level 3 above it
Quadratus lumborum
Origin: Medial aspect of iliac crest and iliolumbar ligament
Insertion: 12th rib
Action: Pulls the rib cage inferiorly. Lateral flexion.
Nerve supply: Anterior primary rami of T12 and L1-3
Which muscles insert to Greater Trochanter?
Mnemonic for muscle attachment on greater trochanter is POGO: Piriformis Obturator internus Gemelli Obturator externus
Relations of parathyroid
Relations Laterally Common carotid Medially Recurrent laryngeal nerve, trachea Anterior Thyroid Posterior Pretracheal fascia
