Laminas Flashcards
T9-L1 houses?
L1-C0 segments
Cervical enlargements? Levels
C5-T1
Lumbar enlargements? Levels
L1-S3
Dura mater is innervated by?
Recurrent meningeal nerve
Subarachnoid space contains?
CSF; Enlarged to form lumbar cistern
2 derivatives of Pia mater
Denticulate ligaments; Filum terminale
Moter neurons function?
to skeletal, smooth, cardiac muscle and glands
Motor neurons located?
Lateral horn and Ventral horn
Motor neurons: Lateral horn contains what type of fibers?
Preganglionic
Motor neurons: Ventral horn contains what type of fibers?
Alpha and gamma
Interneuron forms?
Circuits
Tract neurons has axons projects to
Higher centers
Propriospinal neurons has axons ascend/descend to other _____?
Cord segments
Motor neurons: Skeletal muscle innervated by alpha interneurons is called?
Extrafusal
Motor neurons: Sarcomeres innervated by gamma interneurons is called?
Intrafusal
Tract neurons has cell bodies in? What does it help create?
Gray matter; white matter
Propriospinal is communication with other cord segments, does it go to the brain?
No
Lamina 1 and 2 (Substantia gelatinosa) is called, and function?
Process nociception and thermoreceptors (Pain and temp)
Lamina 3 and 4 function?
Innocuous input. Receiving and processing touch, pressure, vibration, everything but pain and temp (innocuous). Mechanoreceptors synapse in 3 and 4
Lamina 5 function?
Proprioceptive info being processed. (Spindles, joint receptors) and Visceral input
Lamina 6 function?
Proprioceptive
Lamina 1-6 are located in?
Dorsal horn
C1-C3 dorsal horn is the site of convergence of _____ and cord afferents; basis for pain referral from the neck to _____ territory and vice versa.
Trigeminal
Lamina 7 is located in In intermediate gray and ventral
horn . Which will include? ( 3)
- Clarke’s nucleus (C8-T3 ONLY)
- Intermediate lateral cell column
- Sacral autonomic nucleus (S2,3,4)
Lamina 8 function?
Proprioceptive input
Lamina 9 has alpha and gamma motor neurons. Lateral and medial groups will innervate? Function of central?
Medial- Axial muscles
Lateral- Extremities
Phrenic and accessory nuclei
Lamina 10 function?
Sensory input from viscera and nociceptive
