7/3/20151 SPINAL CORD & SPINAL NERVES MARTINI, ANATOMY & PHYSIOLOGY, 9 TH EDITION, CHAPTER # 13 LAB...

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SPINAL CORD & SPINAL NERVESSPINAL CORD & SPINAL NERVES

MARTINI, ANATOMY & PHYSIOLOGY, 9TH EDITION, CHAPTER # 13

LAB MANUAL, Exercise # 19

Page # 235

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NOTE:NOTE:

THIS IS A STUDY GUIDE, NOT AN ALL INCLUSIVE REVIEW.

THERE MIGHT BE THINGS NOT COVERED BY THIS STUDY GUIDE THAT MIGHT BE ASKED IN YOUR PRACTICUMS /

QUIZZES.

STUDENTS ARE RESPONSIBLE FOR READING THEIR TEXBOOK (S) AND FOR ALL THE MATERIAL COVERED DURING THE LABORATORY PERIOD, AS PER THE COURSE SYLLABUS

Competency 6:Competency 6: The Nervous System The Nervous System

Upon successful completion of this laboratory, the students will be able to demonstrate an understanding of the structural and functional features of the nervous system including the special sense organs by:

Describing the structure and functions of the spinal cord and the spinal nerves and their plexuses.

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SPINAL MENINGESSPINAL MENINGES Surrounds the spinal cord for physical stability & Shock absorption Wall of vertebral canal (no part of meninges) Epidural space- contains fat and blood vessels imp for anesthetic injection Dura mater- outermost covering of spinal cord Subdural space Aracnoid mater Subarachnoid space- filled with CSF CSF- shock absorber diffusion medium for wastes, gases, nutrients & chemicals Pia mater -pia=delicate, mater=mother for nourishment

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SPINAL CORDSPINAL CORD Dendicular ligaments- prevent lateral movement of the spinal cord Conus medularis- End part of the spinal cord, like a conus Cauda equina- nerve fibers extending after conus medularis, like a horse tail Filum terminale- to anchor spinal cord vertically by connecting

it with coccyx F- to prevent up & down movement Gray matter- it has nuclei Posterior (dorsal) horns –somatic & visceral sensory nuclei Anterior (ventral) horns-somatic motor nuclei Lateral horns- autonomic (visceral) nuclei

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Grey commissure- to connect two sides of the grey mater Central canal (the hole in the middle)- Conteins CSF(cephalo spinal fluid) White matter- it has tracs or fasciculus Posterior (dorsal) white column (funiculus) Carry sensory info Lateral white column (funiculus)- Carry sensory & motor info Anterior (ventral) white column (funiculus) Carry sensory & motor info Anterior median fissure- deep groove Posterior median sulcus- shallow groove

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Posterior root- carry sensory info

Posterior root ganglia- conteins sensory neurons

Anterior root- carries motor info

Posterior ramus (smaller)- carries sensory & motor info Anterior ramus- (thicker)- carries sensory & motor info

SPINAL NERVESSPINAL NERVES

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PLEXUSESPLEXUSES

CERVICAL BRACHIAL LUMBAR SACRAL

Peripheral Nerves and Peripheral Nerves and PlexusesPlexuses


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CERVICAL PLEXUSCERVICAL PLEXUS

Serves or innervates neck & shoulder Phrenic nerve- it extends below the shoulder to the diaphragm. It causes the diaphragm to contract

important for breathing

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Brachial plexus- serves or innervates upper limb and shoulder

Axillary n- serves deltoid & teres minor And skin of the shoulder (From anterior to posterior)- Radial nerve- serves posterior upper limb Musculocutaneous n-serves anterior arm, biceps brachii & brachialis Median n- serves anterior forearm Ulnar n- serves anterior hand

Spinal Nerves and PlexusesSpinal Nerves and PlexusesThe Brachial Plexus of the Ventral Rami

Major nerves of brachial plexus

Musculocutaneous nerve (lateral cord)

Median nerve (lateral and medial cords)

Ulnar nerve (medial cord)

Axillary nerve (posterior cord)

Radial nerve (posterior cord)

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LUMBAR PLEXUSLUMBAR PLEXUS

It serves or innervates skin & some muscles of anterior abdomen, buttocks, genitalia, anterior lateral & posteromedial thigh & medial surface of leg and foot

Femoral nerve: anterior muscles of the thigh, flexors & adductors of the hip, skin of the thigh(antero medial surface) & skin over the medial surface of leg and foot

RECTUS FEMORIS VASTUS MEDIALIS VASTUS LATERALIS VASTUS INTERMEDIUS


LUMBAR PLEXUS & SACRAL PLEXUSLUMBAR PLEXUS & SACRAL PLEXUS

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SACRAL PLEXUSSACRAL PLEXUS

It serves or innervates: buttock (gluteus) & posterior lower limb, anterior leg & foot lateral leg, some muscles of genitalia including external anal and urethral sphincters

Sciatic n (thiker)- serves posterior thigh Common peroneal n (goes anteriorly)- serves anterior leg & foot Tibial n (goes posteriorly)- serves posterior leg and foot

Components of a Reflex ArchComponents of a Reflex Arch


The Patellar ReflexThe Patellar Reflex


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REMEMBER!REMEMBER!

GO TO THE TUTORING ROOMGO TO THE TUTORING ROOMAND PRACTICE WITH MODELS.AND PRACTICE WITH MODELS.

ROOM 3326.ROOM 3326.

7/3/20151 SPINAL CORD & SPINAL NERVES MARTINI, ANATOMY & PHYSIOLOGY, 9 TH EDITION, CHAPTER # 13 LAB...

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