Anatomy 1st/highest lumbar vertebra. Body bigger than T12, smaller than L2-5 (progressively bigger, supporting more weight). No articular facets for ribs on body or transverse process (unlike thoracic), no transverse foramen (unlike cervical). Clinical Articulates above with T12, below with L2. L1-5 very strong spinal segment, exhibits flexion, extension, lateral flexion, rotation. Vignette Fracture commonly

Anatomy Course Made up of the anterior rami of the spinal nerves L1 to L3, and some of L4 and T12, the subcostal nerve. The lumbar plexus is a part of the lumbosacral plexus. The nerves here all join together in different branching patterns to form a number of terminal branches, such as the iliohypogastric

Anatomy This is a C-shaped cavity within each cerebral hemisphere lined with ependymal cells. They are part of the series of fluid-filled cavities, which make up the ventricular system. It is connected to the third ventricle via the interventricular foramen of Monro. It divides into a body, which occupies the parietal lobe and anterior, posterior

Anatomy Formed from the fusion of the aponeuroses of the abdominal muscles. It forms the midline of the abdomen. It extends from the xiphoid process superiorly to the pubic symphysis inferiorly. Functions The attachment point for the vertical and anterolateral abdominal muscles. Clinical Surgeons tend to make incisions along this line during abdominal surgery due

Anatomy Origin: Posterior tubercles of the transverse processes of the upper four cervical vertebrae (C1 to C4). Insertion: Medial border of the scapula between the superior angle and the spine, opposite the supraspinous fossa. Key Relations: Lies within the floor of the posterior triangle of the neck. Functions -Working with various other muscles of the

Anatomy Origin: Frontal process of maxilla. Insertion: Alar cartilage of nose and upper lip. Key Relations: Lies medial to levator labii superioris. Functions Raises upper lip and opens the nostrils. Supply Nerve Supply: Buccal branch of the facial nerve (CN 7). Blood Supply: Lateral nasal artery. Interested in taking our award-winning Pocket Anatomy app for

Anatomy Origin: Infra-orbital margin of maxilla. Insertion: Skin of upper lateral half of upper lip. Key Relations: Fibres run inferomedially and merge with orbicularis oris. Functions Raises upper lip and forms the nasolabial furrow. e.g. during sadness.. Supply Nerve Supply: Buccal branch of the facial nerve (CN 7). Blood Supply: Superior labial branch of the

Anatomy Origin: Body of the pubis, tendinous arch of obturator fascia and pelvic surface of ischial spine. Insertion: Coccyx, around the anal canal and the anococcygeal ligament. Key Relations: -Forms posterior part of the levator ani muscle. -Contributes to formation of the pelvic diaphragm in association with coccygeus (for more information see the above layer)

Anatomy Course Branches from the axillary artery, beyond the lateral margin of pectoralis minor. It then travels inferomedially on the thoracic wall, following the pectoralis minor muscle. It terminates here, anastomosing with intercostal vessels, internal thoracic arteries and the subscapular artery. Supply Contributes to the blood supply of the front wall of the axilla, the

Anatomy Origin: Maxilla inferior to the infra-orbital foramen. Insertion: Skin at the corner of the mouth. Key Relations: Lies posterior to levator labii superioris, levator labii superioris alaeque nasi and zygomaticus major and minor. Functions Raises corner of the mouth and forms the nasolabial furrow e.g. during sadness.. Supply Nerve Supply: Buccal branch of the