The brain stem for chapter 12 quiz

Structures of the hindbrain form superior to inferior

Midbrain, pons, medulla oblongata

Does the medulla contain all the sensory and motor tracts

Yes

Functions of the medulla in terms of pyramids

It is the reason why the hemispheres control the oppisite side of the body

Medulla function when it comes to the heart and blood and stuff

• It regulates blood pressure

• It regulates breathing

• It controls the heartbeat

Medulla functions when it comes to reflexes

It controls the involuntary reflex centers like sneezing

What does the medulla also have?

It contains motor and sensory nuclei associated with cranial nerves

What is anterior to the cerebellum

The pons

What tracts do the pons contain

• Ascending sensory and motor tracts

• Descending tracts Sensory and motor tracts

• Transverse sensory and motor tracts

Function of the pons in some situations

In some situation it can regulate breathing and adjust activities of those centors in the medulla

Function of midbrain

• Connects the pons and the diencephalon

• Maintains the consciousness

• Genrates reflexive somatic motor responses

Name of the reflex center of the midbrain

Corpora quadrigemina

Two specific reflex centers of the Corpora quadrigemina

• Superior colliculi

• Inferior colliculi

Superior colliculi

Visual reflex center that turns eyes to visual stimulus

Inferior colliculi

Auditory reflex center that turns the eyes to the direction of the sound

Basal Nuclei

Masses of gray matter that lie deep within cerebral hemispheres

Functions of Basal Nuclei

Involved with initiating and terminating movements and supresses unwanted movements

Substantia nigra

Pigmented nuerons that regulate the basal nuclei

The couse of Parkinson’s disease:

The degeneration of the substantia nigra leads to less control of movement

What part of the brain stem surrounds the third ventricle

The diencephalon

The three parts of the diencephalon

• Epithalamus

• Hypothalamus

• thalamus

Epithalamus

Has the pineal gland which secretes melatonin

Function of the thalamus

It decides what sensory information is important to go to the cerebrum to avoid overstimulation

Location of the hypothalamus

It is inferior to the thalamus and it attaches itself to the pituitary gland

Function of the hypothalamus

• It controls and integrates activities of the autonomic nervous system

• It controls the master control gland of the endocrine system

• Regulates eating

• regulated drinking

• controls body temperature