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Osteology of Abdomen and Pelvis
N/A
12
Anatomy
Undergraduate 1
12/11/2010

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Term
Identification of Lumbar Vertebra
Definition
1- Large Size of Body
2- Costal Facets are absent
Term
Body of Lumbar Vertebra
Definition
Height is greater Anteriorly than Posteriorly. This makes the Lumbar spine convex forwards
Term
Vertebral Foramen
Definition
Triangular in shape. Foramen is larger than Thoracic. Smaller than Cervical.
Term
Accessory Processes
Definition
Located at Posteroinferior Aspect of Root of Transverse Processes.
They are called "True Transverse Processes"
Term
Superior Articular Facet
Definition
Concave Facet facing medially and Backwards
Mammilary process at post Border
Term
Inferior Articular Processe
Definition
Convex Facet facing forwards and laterally
Term
Typical Vertebra VS Atypical Vertebra
Definition
Transverse process are THIN AND TAPERING. Whereas in Atypical, Transverse processes are THICK, SHORT, PYRAMIDAL.

2. Spine is longer, without Articular facet. In Atypical, Spine is SMALL, SHORT, and has ARTICULAR FACET for Sacrum

3. Bodies comparatively smaller. In Atypical, body is LARGER. Anterior Surface is deeper than Posterior. This gives them a SHARP LUMBOSACRAL ANGLE.

4- Superior articular Facet is backwards and medially. In Atypical, Superior Articular facet is MORE BACKWARDS.

5- Inferior Articular facet is forwards and laterally. In Atypical, Inferior Articular facet : MORE FORWARDS
Term
Attachments on the Body of Lumbar Vertebra
Definition
1- Intervertebral Disk
2- Anterior and Posterior Longitudinal Ligaments
3- Right Crus of Diaphragm (upper 3 vertebra)
Left Crus of Diaphragm (Upper two Vertebra)
4- Psoas Major Muscle
5- Tendinous Arches
Term
Contents of lumbar Vertebral Canal
Definition
1- Spinal Meninges
2- 1st lumbar vertebra contains CONUS MEDULLARIS
3- lower four vertebrae contain CAUDA EQUINA
Term
Attachments of Lumbar Vertebral Arch
Definition
Lamina : Ligamentum Flava
Spine : Posterior layer of Lumbar Fascia, Interspinous ligament, Supraspinous ligament, Erector Spinae, Multibifidus, interspinal muscles

Transverse Processes :
Tip : Attachment to the middle layer of Lumbar Fascia. Tip of first lumbar vertebrae gives attachment to Lateral and Medial Arcuate ligament. and Tips of last lumbar vertebra gives attachment to Iliolumbar ligament.
2. Anterior Surface of Transverse process has a faint ridge for the attachment of Anterior layer of lumbar fascia. Medial to this ridge, is the attachment of PSOAS MAJOR and lateral to this ridge is the attachment of Quadratus Lumborum.

Posterior Surface gives attachment to : muscles of the back, including LONGISSIMUS THORACIS. Accessory process gives attachment to medial intertransverse muscle and upper and lower borders provide attachment to LATERAL INTERTRANSVERSE muscles.
Mamillary process gives attachment to multifidus and medial intertransverse muscles.
Term
Cauda Equina Syndrome
Definition
Caused by Fracture Dislocation of lumbar vertebrae
FAID
Flaccid paraplegia
Analgeisa and Anaesthesia
Impotence
Disturbance of Sphincter- Incontinence of urine and feaces
Term
Joints
Definition
Between Vertebral Bodies : Secondary Cartilaginous joints - Intervertebral Disc and Anterior and Posterior Longitudinal Ligaments

Joints of Vertebral Arches : Plane Synovial Joints - Gliding Movements - Accesorry ligaments include : Interspinous, intertransverse, suprapinous ligaments and ligamentum flava

Lumbar spine permits MAXIMUM EXTENSION, considerable amount of flexion and lateral flexion, and LEAST Rotation
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